Term ends Apr 20, 2032 · Low confidence
20-year base term ends Apr 20, 2032
Reissue of US 8,557,548, which was surrendered when this reissue was granted; its term and maintenance fees continue here.
Held by Pfizer Inc.
Filed Oct 14, 2015 as application 14/883,000 · Granted Apr 25, 2017
Base term, 20 years from filing
Today
2012
2032
Clock starts
Apr 20, 2012
Apr 20, 2012
Term ends
Apr 20, 2032
Apr 20, 2032
Granted
Apr 25, 2017
Apr 25, 2017
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,787,652, US 8,481,692, US 8,900,597, to Apr 20, 2032. The term already ends on or before that date, so the cap shortened nothing.
0 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from the original patent's grant (Oct 15, 2013). This counts the ones the record shows paid.
13
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. 0 of 3 maintenance fees are paid so far. Confidence: Low. 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 Apr 20, 2012, when application 13/451,631, the earliest non-provisional in its chain, was filed (this one was filed Oct 14, 2015); a parent in its chain could not be resolved (the next row) | Apr 20, 2032 | High confidence |
| Continuity chain | A reissue: its term follows the original patent's, with the original's term adjustment; a parent in the chain could not be resolved | dated from this application's own claim | Low confidence |
| Patent term adjustment | No term adjustment record on a grant after 2005, so none is added | no change | Medium confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,787,652, US 8,481,692, US 8,900,597) | resolves to Apr 20, 2032, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | The reissue's fees post to its original, whose fee record is not available (likely before 2001) | In force | Medium confidence |
| Computed term end | The steps above, in order | Apr 20, 2032 | Low confidence |
This family
| US 8,481,692 | Surrendered on reissue Dec 2021 | Dec 2021 |
| US 8,557,548 | Surrendered on reissue Apr 2017 | Apr 2017 |
| US 8,900,597 | Surrendered on reissue Aug 2017 | Aug 2017 |
| US 9,745,354 | In force Apr 2032 | Apr 2032 |
| US 9,187,536 | Surrendered on reissue Dec 2021 | Dec 2021 |
| US RE46,376 | this patent Apr 2032 | Apr 2032 |
| US RE46,518 | In force Apr 2032 | Apr 2032 |
| US 10,774,117 | In force Apr 2032 | Apr 2032 |
8 of 13 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 |
|---|---|---|---|
| Mar 2, 2017 Reel 41437, frame 117 | Sidhu, Maninder K.; Anderson, Annaliesa Sybil; Donald, Robert G.k.; Jansen, Kathrin Ute; Kaylan, Narender K.; Mininni, Terri L.; Moran, Justin Keith; Ruppen, Mark E.; Flint, Michael James | Pfizer Inc. | Assignment of Assignor's Interest |
| Mar 15, 2017 Reel 41748, frame 31 | Sidhu, Maninder K.; Anderson, Annaliesa Sybil; Donald, Robert G.k.; Jansen, Kathrin Ute; Kalyan, Narender K.; Mininni, Terri L.; Moran, Justin Keith; Ruppen, Mark E.; Flint, Michael James | Wyeth LLC | Corrective Assignment to Correct the Receiving Party Previously Recorded at Reel: 041437 Frame: 0117. Assignor(S) Hereby Confirms the Assignment. |
| Mar 27, 2023 Reel 63165, frame 455 | Wyeth LLC | Wyeth LLC | Assignee Address Correction |
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
Apr 2032
Term ends Apr 20, 2032. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,787,652, US 8,481,692, US 8,900,597, ends no earlier than this term, so it caps nothing.
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2017 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.