Collateral for a security interest recorded Sep 5, 2024 (HPS Investment Partners, LLC).
Term ends Aug 11, 2031 · Medium confidence
20-year base term ends Feb 21, 2031
Why Medium: A parent in the chain could not be resolved.
Filed Jan 8, 2015 as application 14/592,179 · Granted May 21, 2019
Base term plus 171 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Feb 21, 2011
Feb 21, 2011
Term ends
Aug 11, 2031
Aug 11, 2031
Granted
May 21, 2019
May 21, 2019
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
171
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
11
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 runs 171 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. 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 Feb 21, 2011, when the earliest non-provisional application in its chain was filed (this one was filed Jan 8, 2015); a parent in its chain could not be resolved (the next row) | Feb 21, 2031 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +171 days, USPTO patent term adjustment record | Aug 11, 2031 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 11, 2031 | Medium confidence |
This family
| US 9,485,050 | In force no later than Nov 2031 | no later than Nov 2031 |
| US 8,705,741 | Lapsed on the fee record Apr 2026 | Apr 2026 |
| Application PCT/US2011/025767 | PCT application no patent term | no patent term |
| US 9,641,278 | In force Jun 2031 | Jun 2031 |
| Application 14/063,955 | Abandoned not computed | not computed |
| Application 14/143,726 | Abandoned not computed | not computed |
| US 10,298,480 | this patent Aug 2031 | Aug 2031 |
| Application 15/584,465 | Abandoned not computed | not computed |
8 of 11 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Dec 24, 2017 Reel 44957, frame 213 | Sonus, Inc. | Sonus Networks, Inc. | Change of Name |
| Dec 24, 2017 Reel 44957, frame 243 | Solstice Sapphire, Inc.; Sonus Networks, Inc.; Sonus Networks, Inc. | Sonus, Inc. | Merger and Change of Name |
| Jan 2, 2018 Reel 44978, frame 801 | Genband US LLC; Sonus Networks, Inc. | Silicon Valley Bank, As Administrative Agent | Security Interest |
| Jan 16, 2019 Reel 48078, frame 36 | Sonus Networks, Inc. | Ribbon Communications Operating Company, Inc. | Change of Name |
| 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 |
| Sep 5, 2024 Reel 68857, frame 290 | Ribbon Communications Operating Company, Inc. | HPS Investment Partners, LLC, as Administrative Agent | Short-Form Patents Security Agreement |
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
Aug 2031
Term ends Aug 11, 2031. Maintenance fees still fall due before then
Note
The 171 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
15
later US patents cite this one
That is top 25% of utility patents granted in 2019 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.