Also listed on Pfizer Products Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Apr 4, 2028 · High confidence
20-year base term ends Nov 23, 2027
Held by Zoetis Services LLC
Filed Nov 14, 2022 as application 17/986,286 · Granted May 6, 2025
Base term plus 133 days of patent term adjustment (USPTO delay)
Today
2007
2028
Clock starts
Nov 23, 2007
Nov 23, 2007
Term ends
Apr 4, 2028
Apr 4, 2028
Granted
May 6, 2025
May 6, 2025
base term
patent term adjustment
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
133
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
None due
Maintenance fees
This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.
5
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 133 days past its 20-year base term on prosecution delay. No maintenance fee can end this term early. 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 Nov 23, 2007, when application PCT/IB2007/003666, the earliest non-provisional in its chain, was filed (this one was filed Nov 14, 2022) | Nov 23, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +133 days, USPTO patent term adjustment record | Apr 4, 2028 | 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 | No maintenance fee can end the term early | In force | High confidence |
| Computed term end | The steps above, in order | Apr 4, 2028 | High confidence |
This family
| Application 12/521,148 | Abandoned not computed | not computed |
| US 11,524,067 | In force Nov 2027 | Nov 2027 |
| US 11,524,068 | In force Nov 2027 | Nov 2027 |
| US 12,290,559 | this patent Apr 2028 | Apr 2028 |
4 of 5 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 |
|---|---|---|---|
| Apr 1, 2025 Reel 70696, frame 875 | Tucker, Cassius M.; Haworth, John D. | Pfizer Inc.; Pfizer Products Inc. | Assignment of Assignor's Interest |
| Apr 1, 2025 Reel 70703, frame 536 | Pfizer Inc. | Ah USA 42 LLC | Assignment of Assignor's Interest |
| Apr 1, 2025 Reel 70703, frame 682 | Zoetis LLC | Zoetis Services LLC | Assignment of Assignor's Interest |
| Apr 1, 2025 Reel 70703, frame 827 | Zoetis Services LLC | Zoetis Services LLC | Address Change of Assignee |
| Apr 1, 2025 Reel 70704, frame 293 | Ah USA 42 LLC | Zoetis LLC | Change of Name |
| Apr 1, 2025 Reel 70735, frame 316 | Tucker, Cassius M.; Haworth, John D. | Pfizer Inc. | Corrective Assignment to Correct the Remove Assignee Previously Recorded at Reel: 18792 Frame: 428. Assignor(S) Hereby Confirms the Assignment. |
| Apr 1, 2025 reel/frame not recorded | Haworth, John D.; Tucker, Cassius M. | Pfizer Inc. | Assignment of Assignor's Interest |
| Apr 1, 2025 reel/frame not recorded | Haworth, John D.; Tucker, Cassius M. | Pfizer Products 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.
What's changing
Apr 2028
Term ends Apr 4, 2028. No further fees fall due before then
Note
The 133 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
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.