Term ends Mar 29, 2030 · High confidence
20-year base term ends Aug 24, 2027
Held by Knoa Pharma LLC
Filed Aug 24, 2007 as application 11/844,872 · Granted Nov 25, 2014
Base term plus 948 days of patent term adjustment (USPTO delay)
Today
2007
2030
Clock starts
Aug 24, 2007
Aug 24, 2007
Term ends
Mar 29, 2030
Mar 29, 2030
Granted
Nov 25, 2014
Nov 25, 2014
base term
patent term adjustment
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
948
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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 runs 948 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 this application, 11/844,872, was filed | Aug 24, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +948 days, USPTO patent term adjustment record | Mar 29, 2030 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 29, 2030 | High confidence |
This family
| US 8,894,987 | this patent 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 |
|---|---|---|---|
| Oct 16, 2007 Reel 19967, frame 870 | McKenna, William H.; Mannion, Richard O.; O'donnell, Edward P.; Huang, Haiyong H. | Purdue Pharma L.P. | Assignment of Assignor's Interest |
| Aug 14, 2014 reel/frame not recorded | Purdue Pharma L.P. | Purdue Pharma L.P. | Assignment of Assignor's Interest |
| Aug 14, 2014 reel/frame not recorded | Purdue Pharma L.P. | Purdue Pharmaceuticals L.P. | Assignment of Assignor's Interest |
| Aug 14, 2014 Reel 33534, frame 96 | Purdue Pharma L.P. | Purdue Pharma L.P.; Purdue Pharmaceuticals 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
Mar 2030
Term ends Mar 29, 2030. No further fees fall due before then
Note
The 948 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
270
later US patents cite this one
That is top 5% of utility patents granted in 2014 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.