Collateral for a security interest recorded Jul 28, 2025 (Blue Torch Finance LLC).
Term ends Nov 30, 2026 · High confidence
20-year base term ended May 31, 2022
Held by Mavenir Ltd.
Filed May 31, 2002 as application 10/158,072 · Granted Jun 12, 2012
Base term plus 1644 days of patent term adjustment (USPTO delay)
Today
2002
2026
Clock starts
May 31, 2002
May 31, 2002
Term ends
Nov 30, 2026
Nov 30, 2026
Granted
Jun 12, 2012
Jun 12, 2012
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,644
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 1644 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 May 31, 2002, when this application, 10/158,072, was filed | May 31, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1644 days, USPTO patent term adjustment record | Nov 30, 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 30, 2026 | High confidence |
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 31, 2002 Reel 12956, frame 701 | Michael, Erez; Kringel, Shlomi | Comverse, Ltd. | Assignment of Assignor's Interest |
| Apr 18, 2017 Reel 42278, frame 185 | Comverse Ltd. | Xura Ltd. | Change of Name |
| May 2, 2017 Reel 42383, frame 797 | Xura Ltd. | Mavenir Ltd. | Change of Name |
| Jul 28, 2025 Reel 72268, frame 439 | Mavenir Networks, Inc.; Mavenir Systems, Inc.; Argyle Data, Inc.; Mavenir, Inc.; Aquto Corporation; Mavenir Ipa UK Limited; Mavenir Systems UK Limited; Mavenir Ltd.; Mavenir US Inc. | Blue Torch Finance LLC | Security Interest |
| Jul 29, 2025 Reel 72245, frame 764 | Mavenir Networks, Inc.; Mavenir Systems, Inc.; Argyle Data, Inc.; Mavenir, Inc.; Aquto Corporation; Mavenir Ipa UK Limited; Mavenir Systems UK Limited; Mavenir Ltd.; Mavenir US Inc. | Glas USA LLC | Grant of Security Interest - Patents |
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 30, 2026. No further fees fall due before then
Note
The 1644 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
65
later US patents cite this one
That is top 10% of utility patents granted in 2012 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.