Term ended no later than Aug 23, 2021 · Medium confidence
20-year base term ended Aug 23, 2021
Held by Genband US LLC
Filed May 25, 2005 as application 11/137,995 · Granted Dec 16, 2008
Base term, 20 years from filing
Today
Ended no later than Aug 23, 2021
2001
2026
Clock starts
Aug 23, 2001
Aug 23, 2001
Ended no later than
Aug 23, 2021
Aug 23, 2021
Granted
Dec 16, 2008
Dec 16, 2008
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
3
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 Aug 23, 2001, when application 09/938,228, the earliest non-provisional in its chain, was filed (this one was filed May 25, 2005) | Aug 23, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | no later than Aug 23, 2021 | Medium confidence |
This family
| US 6,931,211 | Term ended Dec 2022 | Dec 2022 |
| US 7,545,801 | In force Nov 2026 | Nov 2026 |
| US 7,466,924 | this patent no later than Aug 2021 | no later than Aug 2021 |
The applications whose file history this site holds. The family may have others.
Assignments
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 |
|---|---|---|---|
| May 25, 2005 Reel 16604, frame 579 | English, Daniel W.; Galvin, Mark | Cedar Point Communications, Inc. | Assignment of Assignor's Interest |
| Jan 10, 2011 Reel 25610, frame 391 | Cedar Point Communications, Inc. | Cedar Point Communications, LLC | Change of Name |
| Dec 2, 2011 Reel 27315, frame 293 | Genbend US LLC (a Delaware LLC) | Comerica Bank (a Texas Banking Association), as Agent; Attn: National Documentation Services | Amended and Restated Intellectual Property Security Agreement |
| Sep 24, 2012 Reel 29014, frame 614 | Cedar Point Communications LLC | Genband US LLC | Merger |
| Jul 6, 2016 Reel 39269, frame 234 | Genband US LLC | Silicon Valley Bank, As Administrative Agent | Patent Security Agreement |
| Jul 7, 2016 Reel 39280, frame 467 | Comerica Bank, As Agent | Genband US LLC | Release and Reassignment of Patents |
| Jan 3, 2017 Reel 41422, frame 80 | Genband US LLC | Silicon Valley Bank, As Administrative Agent | Corrective Assignment to Correct Patent No. 6381239 Previously Recorded at Reel: 039269 Frame: 0234. Assignor(S) Hereby Confirms the Patent Security Agreement. |
| Dec 29, 2017 Reel 44986, frame 303 | Silicon Valley Bank, As Administrative Agent | Genband US LLC | Termination and Release of Patent Security Agreement |
| Jan 2, 2018 Reel 44978, frame 801 | Genband US LLC; Sonus Networks, Inc. | Silicon Valley Bank, As Administrative Agent | Security Interest |
| Mar 3, 2020 Reel 52076, frame 905 | Ribbon Communications Operating Company, Inc. | Citizens Bank, N.A., as Administrative Agent | Security Interest |
| Dec 6, 2021 Reel 58949, frame 497 | Silicon Valley Bank, As Administrative Agent | Ribbon Communications Operating Company, Inc. (F/K/A Genband US LLC and Sonus Networks, Inc.) | Termination and Release of Patent Security Agreement at R/F 044978/0801 |
| Jun 24, 2024 Reel 67822, frame 433 | Citizens Bank, N.a. | Ribbon Communications Operating Company, Inc. (F/K/A Genband US LLC and Sonus Networks, Inc.) | Release of Security 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Aug 23, 2021. We will not guess the cap.
Citations
19
later US patents cite this one
That is above 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.