Also listed on Nortel Networks Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 27, 2026 · High confidence
20-year base term ended Sep 25, 2023
Held by Pulselink Systems LLC
Filed Sep 25, 2003 as application 10/669,252 · Granted Aug 26, 2008
Base term plus 1159 days of patent term adjustment (USPTO delay)
Today
2003
2026
Clock starts
Sep 25, 2003
Sep 25, 2003
Term ends
Nov 27, 2026
Nov 27, 2026
Granted
Aug 26, 2008
Aug 26, 2008
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,159
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
This patent's term runs 1159 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 25, 2003, when this application, 10/669,252, was filed | Sep 25, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1159 days, USPTO patent term adjustment record | Nov 27, 2026 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 27, 2026 | High confidence |
Assignments
The 40 most recent of 46 recorded documents are shown; the 6 earliest are not. Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 4, 2021 Reel 57700, frame 935 | Avaya Management LP | Citibank, N.A., as Collateral Agent | Security Interest |
| Aug 5, 2022 Reel 61087, frame 386 | Avaya Inc.; Intellisist, Inc.; Avaya Management L.P.; Avaya Cabinet Solutions LLC | Wilmington Trust, National Association, as Collateral Agent | Intellectual Property Security Agreement |
| Apr 26, 2023 Reel 63456, frame 428 | Citibank, N.A., as Collateral Agent | Avaya Holdings Corp.; Avaya Inc.; Avaya Management L.P. | Release of Security Interest in Patents at Reel 48612/FRAME 0582 |
| Apr 26, 2023 Reel 63458, frame 303 | Citibank, N.A., as Collateral Agent | Avaya Holdings Corp.; Avaya Inc.; Avaya Management L.P. | Release of Security Interest in Patents at Reel 57700/FRAME 0935 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Holdings Corp. | Release of Security Interest in Patents at Reel 48612/FRAME 0582 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Inc. | Release of Security Interest in Patents at Reel 48612/FRAME 0582 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Management L.P. | Release of Security Interest in Patents at Reel 48612/FRAME 0582 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Holdings Corp. | Release of Security Interest in Patents at Reel 57700/FRAME 0935 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Inc. | Release of Security Interest in Patents at Reel 57700/FRAME 0935 |
| Apr 26, 2023 reel/frame not recorded | Citibank, N.A., as Collateral Agent | Avaya Management L.P. | Release of Security Interest in Patents at Reel 57700/FRAME 0935 |
| May 3, 2023 Reel 63742, frame 1 | Avaya Management L.P.; Avaya Inc.; Intellisist, Inc.; Knoahsoft Inc. | Wilmington Savings Fund Society, FSB [Collateral Agent] | Intellectual Property Security Agreement |
| May 4, 2023 Reel 63542, frame 662 | Avaya Inc.; Avaya Management L.P.; Intellisist, Inc. | Citibank, N.A., as Collateral Agent | Intellectual Property Security Agreement |
| May 18, 2023 Reel 63690, frame 359 | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Management L.P.; Avaya Inc.; Intellisist, Inc.; Avaya Integrated Cabinet Solutions LLC | Release of Security Interest in Patents (Reel/Frame 61087/0386) |
| May 18, 2023 Reel 63691, frame 294 | Goldman Sachs Bank USA., as Collateral Agent | Avaya Inc.; Intellisist, Inc.; Avaya Integrated Cabinet Solutions LLC; Octel Communications LLC; Vpnet Technologies, Inc.; Zang, Inc. (Former Name of Avaya Cloud Inc.); Hyperquality, Inc.; Hyperquality II, LLC; Caas Technologies, LLC; Avaya Management L.P. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 Reel 63705, frame 23 | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Management L.P.; Avaya Inc.; Intellisist, Inc.; Avaya Integrated Cabinet Solutions LLC | Release of Security Interest in Patents (Reel/Frame 53955/0436) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Management L.P. | Release of Security Interest in Patents (Reel/Frame 61087/0386) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Inc. | Release of Security Interest in Patents (Reel/Frame 61087/0386) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Intellisist, Inc. | Release of Security Interest in Patents (Reel/Frame 61087/0386) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Integrated Cabinet Solutions LLC | Release of Security Interest in Patents (Reel/Frame 61087/0386) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Avaya Inc. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Intellisist, Inc. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Avaya Integrated Cabinet Solutions LLC | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Octel Communications LLC | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Vpnet Technologies, Inc. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Zang, Inc. (Former Name of Avaya Cloud Inc.) | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Hyperquality, Inc. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Hyperquality II, LLC | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Caas Technologies, LLC | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Goldman Sachs Bank USA., as Collateral Agent | Avaya Management L.P. | Release of Security Interest in Patents (Reel/Frame 48612/0598) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Management L.P. | Release of Security Interest in Patents (Reel/Frame 53955/0436) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Inc. | Release of Security Interest in Patents (Reel/Frame 53955/0436) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Intellisist, Inc. | Release of Security Interest in Patents (Reel/Frame 53955/0436) |
| May 18, 2023 reel/frame not recorded | Wilmington Trust, National Association, as Notes Collateral Agent | Avaya Integrated Cabinet Solutions LLC | Release of Security Interest in Patents (Reel/Frame 53955/0436) |
| Feb 4, 2026 Reel 74944, frame 573 | Citibank, N.a. | Avaya LLC (F/K/A Avaya Inc.); Avaya Management L.P. | Intellectual Property Partial Release and Reassignment |
| Feb 4, 2026 Reel 74981, frame 940 | Wilmington Savings Fund Society, FSB | Avaya LLC (F/K/A Avaya Inc.); Avaya Management L.P. | Intellectual Property Partial Release and Reassignment |
| Feb 4, 2026 reel/frame not recorded | Citibank, N.a. | Avaya LLC (F/K/A Avaya Inc.) | Intellectual Property Partial Release and Reassignment |
| Feb 4, 2026 reel/frame not recorded | Citibank, N.a. | Avaya Management L.P. | Intellectual Property Partial Release and Reassignment |
| Feb 4, 2026 reel/frame not recorded | Wilmington Savings Fund Society, FSB | Avaya LLC (F/K/A Avaya Inc.) | Intellectual Property Partial Release and Reassignment |
| Feb 4, 2026 reel/frame not recorded | Wilmington Savings Fund Society, FSB | Avaya Management L.P. | Intellectual Property Partial Release and Reassignment |
| Mar 14, 2026 Reel 74909, frame 627 | Avaya LLC | Pulselink Systems LLC | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
What's changing
Nov 2026
Term ends Nov 27, 2026. No further fees fall due before then
Note
The 1159 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
later US patents cite this one
That is below the median of utility patents granted in 2008 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.