Term ends Aug 9, 2039 · Medium confidence
20-year base term ends Aug 9, 2039
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 10,941,118, US 11,905,255, US 12,116,347), so the cap could be lower.
Held by Pfizer Inc.
Filed Jan 20, 2023 as application 18/157,592 · Granted May 13, 2025
Base term plus 371 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2019
2039
Clock starts
Aug 9, 2019
Aug 9, 2019
Term ends
Aug 9, 2039
Aug 9, 2039
Granted
May 13, 2025
May 13, 2025
base term
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
371
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,590,087, US 10,710,966, US 10,941,118, US 11,566,006, US 11,884,635, US 11,905,255, US 12,116,347.
0 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.
12
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 371 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 0 of 3 maintenance fees are 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 Aug 9, 2019, when application 16/537,394, the earliest non-provisional in its chain, was filed (this one was filed Jan 20, 2023) | Aug 9, 2039 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +371 days, USPTO patent term adjustment record | Aug 14, 2040 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,590,087, US 10,710,966, US 10,941,118, US 11,566,006, US 11,884,635, US 11,905,255, US 12,116,347) | capped to Aug 9, 2039 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 9, 2039 | Medium confidence |
This family
| US 10,590,087 | In force Aug 2039 | Aug 2039 |
| US 10,710,966 | In force Aug 2039 | Aug 2039 |
| US 10,941,118 | In force no later than Aug 2039 | no later than Aug 2039 |
| US 11,566,006 | In force Feb 2040 | Feb 2040 |
| US 11,884,634 | In force no later than Aug 2039 | no later than Aug 2039 |
| US 12,297,177 | this patent Aug 2039 | Aug 2039 |
| US 11,820,748 | In force Aug 2039 | Aug 2039 |
| US 11,845,732 | In force no later than Aug 2039 | no later than Aug 2039 |
8 of 12 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 |
|---|---|---|---|
| Jun 29, 2023 Reel 64120, frame 81 | Anderson, Stephen Richard; Greer, Elaine Mildred; Maloney, Mark Thomas; Yu, Shu | Pfizer Inc. | Assignment of Assignor's Interest |
| Jun 29, 2023 Reel 64120, frame 93 | Albert, Ekaterina; Rigsbee, Emily | Albany Molecular Research, Inc. and Its Corporate Affiliates | Assignment of Assignor's Interest |
| Jun 29, 2023 Reel 64178, frame 227 | Albany Molecular Research, Inc. and Its Corporate Affiliates | Pfizer Inc. | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Aug 2039
Term ends Aug 9, 2039. Maintenance fees still fall due before then
Note
The 371 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,590,087, US 10,710,966, US 10,941,118, US 11,566,006, US 11,884,635, US 11,905,255, US 12,116,347.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.