Also listed on Purdue Pharmaceuticals L.P., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 24, 2027 · High confidence
20-year base term ends Aug 24, 2027
Held by Knoa Pharma LLC
Filed Oct 16, 2014 as application 14/515,924 · Granted Jul 21, 2015
Base term, 20 years from filing
Today
2007
2027
Clock starts
Aug 24, 2007
Aug 24, 2007
Term ends
Aug 24, 2027
Aug 24, 2027
Granted
Jul 21, 2015
Jul 21, 2015
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 8,808,741, US 8,815,289, US 8,821,929, US 8,834,925, US 8,846,086, US 8,894,987, US 8,894,988, US 8,911,719, US 9,095,614, US 9,095,615, US 9,101,661, to Aug 24, 2027. 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.
71
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 24, 2007, when application 11/844,872, the earliest non-provisional in its chain, was filed (this one was filed Oct 16, 2014) | Aug 24, 2027 | 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 8,808,741, US 8,815,289, US 8,821,929, US 8,834,925, US 8,846,086, US 8,894,987, US 8,894,988, US 8,911,719, US 9,095,614, US 9,095,615, US 9,101,661) | resolves to Aug 24, 2027, 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 24, 2027 | High confidence |
This family
| US 8,894,987 | In force Mar 2030 | Mar 2030 |
| Application 13/803,132 | Abandoned not computed | not computed |
| US 8,894,988 | In force Aug 2027 | Aug 2027 |
| US 8,911,719 | In force Aug 2027 | Aug 2027 |
| Application 13/901,174 | Abandoned not computed | not computed |
| Application 13/901,199 | Abandoned not computed | not computed |
| US 8,846,086 | In force Aug 2027 | Aug 2027 |
| Application 13/901,142 | Abandoned not computed | not computed |
8 of 71 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 10, 2015 reel/frame not recorded | Purdue Pharma L.P. | Purdue Pharma L.P. | Assignment of Assignor's Interest |
| Jun 10, 2015 reel/frame not recorded | Purdue Pharma L.P. | Purdue Pharmaceuticals L.P. | Assignment of Assignor's Interest |
| Jun 10, 2015 Reel 35818, frame 788 | Purdue Pharma L.P. | Purdue Pharma L.P.; Purdue Pharmaceuticals L.P. | Assignment of Assignor's Interest |
| Jul 31, 2017 Reel 43148, frame 589 | McKenna, William H.; Mannion, Richard O.; O'donnell, Edward P.; Huang, Haiyong H. | Purdue Pharma L.P. | Assignment of Assignor's Interest |
| May 6, 2026 Reel 75645, frame 702 | Purdue Pharma L.P | Knoa Pharma LLC | 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
Aug 2027
Term ends Aug 24, 2027. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,808,741, US 8,815,289, US 8,821,929, US 8,834,925, US 8,846,086, US 8,894,987, US 8,894,988, US 8,911,719, US 9,095,614, US 9,095,615, US 9,101,661, ends no earlier than this term, so it caps nothing.
Citations
76
later US patents cite this one
That is top 10% of utility patents granted in 2015 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.