Lapsed Sep 15, 2024 on the fee record · Medium confidence
20-year base term ends Aug 31, 2032
Why Medium: A parent in the chain could not be resolved.
First maintenance fee unpaid; grace period ended.
Held by Purdue Pharma L.P.
Filed Jun 1, 2018 as application 15/996,053 · Granted Sep 15, 2020
Base term, 20 years from filing
Today
Lapsed Sep 15, 2024
2012
2032
Clock starts
Aug 31, 2012
Aug 31, 2012
No longer in force
Sep 15, 2024
Sep 15, 2024
Granted
Sep 15, 2020
Sep 15, 2020
Term would have run to
Aug 31, 2032
Aug 31, 2032
base term
after the term ends
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 9,163,008, US 9,637,458, to Aug 31, 2032. The term already ends on or before that date, so the cap shortened nothing.
0 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
5
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Aug 31, 2032: 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. 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 31, 2012, when application PCT/IB2012/001871, the earliest non-provisional in its chain, was filed (this one was filed Jun 1, 2018); a parent in its chain could not be resolved (the next row) | Aug 31, 2032 | 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 | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,163,008, US 9,637,458) | resolves to Aug 31, 2032, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 2 maintenance fees paid | lapsed Sep 15, 2024 | High confidence |
| Computed term end | The steps above, in order | Sep 15, 2024 | Medium confidence |
This family
| US 9,163,008 | In force Aug 2032 | Aug 2032 |
| US 9,656,968 | In force Aug 2032 | Aug 2032 |
| US 10,059,675 | In force Aug 2032 | Aug 2032 |
| US 10,774,050 | this patent Sep 2024 | Sep 2024 |
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 |
|---|---|---|---|
| Sep 20, 2018 Reel 46928, frame 343 | Ni, Chiyou; Tafesse, Laykea; Yao, Jiangchao; Youngman, Mark A.; Park, Minnie; Shao, Bin | Purdue Pharma L.P. | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,163,008, US 9,637,458, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2020 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.