Term ends Aug 22, 2033 · High confidence
20-year base term ends Aug 22, 2033
Held by West Technology Group, LLC
Filed Jan 24, 2017 as application 15/413,615 · Granted Jan 16, 2018
Base term, 20 years from filing
Today
2013
2033
Clock starts
Aug 22, 2013
Aug 22, 2013
Term ends
Aug 22, 2033
Aug 22, 2033
Granted
Jan 16, 2018
Jan 16, 2018
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,247,066, US 9,553,991, to Aug 22, 2033. The term already ends on or before that date, so the cap shortened nothing.
2 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.
4
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 resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. 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 Aug 22, 2013, when application 13/973,772, the earliest non-provisional in its chain, was filed (this one was filed Jan 24, 2017) | Aug 22, 2033 | 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 resolved from the filed document (refs US 9,247,066, US 9,553,991) | resolves to Aug 22, 2033, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 22, 2033 | High confidence |
This family
| US 9,247,066 | In force Aug 2033 | Aug 2033 |
| US 9,553,991 | In force Aug 2033 | Aug 2033 |
| US 9,871,919 | this patent Aug 2033 | Aug 2033 |
| US 10,455,091 | In force Aug 2033 | Aug 2033 |
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 |
|---|---|---|---|
| Oct 10, 2017 Reel 44166, frame 901 | West Corporation | Credit Suisse AG, Cayman Islands Branch, as Collateral Agent | Notice of Grant of Security Interest in Patents (First Lien) |
| Jan 31, 2023 Reel 62571, frame 18 | CX360, Inc.; West Technology Group, LLC (FKA Intrado Corporation, FKA West Corporation); Intrado Interactive Services Corporation (FKA West Interactive Services Corporation, FKA Cobalt Acquisition Company) | U.S. Bank Trust Company, National Association, as Collateral Agent | Notice of Grant of Security Interest (Second Lien) in Patents |
| Apr 3, 2023 Reel 63239, frame 876 | Intrado Corporation | West Technology Group, LLC | Change of Name |
| Apr 3, 2023 Reel 63239, frame 900 | West Corporation | Intrado Corporation | Change of Name |
| Nov 25, 2024 Reel 69438, frame 775 | UBS AG, Stamford Branch (as Successor to Credit Suisse AG, Cayman Islands Branch in Its Capacity as Collateral Agent) | Wilmington Trust, National Association, as the Successor Collateral Agent | Omnibus Assignment of Security Interest in Intellectual Property |
| Jul 14, 2026 Reel 75975, frame 65 | U.S. Bank Trust Company, National Association | Televox, Inc. (FKA Intrado Interactive Services Corporation); West Technology Group, LLC | Notice of Partial Release of Security Interest in Patents |
| Jul 14, 2026 reel/frame not recorded | U.S. Bank Trust Company, National Association | Televox, Inc. (FKA Intrado Interactive Services Corporation) | Notice of Partial Release of Security Interest in Patents |
| Jul 14, 2026 reel/frame not recorded | U.S. Bank Trust Company, National Association | West Technology Group, LLC | Notice of Partial Release of Security Interest in Patents |
| Oct 7, 2026 reel/frame not recorded | Wilmington Trust, National Association | West Corporation | Notice of Partial Release of Security Interest in Patents |
| Oct 7, 2026 reel/frame not recorded | Wilmington Trust, National Association | West Technology Group, LLC | Notice of Partial Release of Security Interest in Patents |
| Oct 7, 2026 Reel 76640, frame 108 | Wilmington Trust, National Association | West Corporation; West Technology Group, LLC | Notice of Partial Release of Security Interest in 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.
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Alerts on its grants, lapses and transfers.
What's changing
Aug 2033
Term ends Aug 22, 2033. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,247,066, US 9,553,991, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2018 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.