Term ends Dec 20, 2027 · High confidence
20-year base term ended Jun 19, 2026
Filed Oct 15, 2008 as application 11/917,890 · Granted Mar 6, 2012
Base term plus 549 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Jun 19, 2006
Jun 19, 2006
Term ends
Dec 20, 2027
Dec 20, 2027
Granted
Mar 6, 2012
Mar 6, 2012
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
549
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.
2
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 549 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 Jun 19, 2006, when application PCT/US2006/023856, the earliest non-provisional in its chain, was filed (this one was filed Oct 15, 2008) | Jun 19, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +549 days, USPTO patent term adjustment record | Dec 20, 2027 | 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 | Dec 20, 2027 | High confidence |
This family
| Application PCT/US2006/023856 | PCT application no patent term | no patent term |
| US 8,128,929 | this patent Dec 2027 | Dec 2027 |
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 |
|---|---|---|---|
| Aug 12, 2008 Reel 21373, frame 125 | Plymate, Stephen R. | Washington, University Of | Assignment of Assignor's Interest |
| Aug 12, 2008 Reel 21373, frame 542 | Ludwig, Dale L. | Imclone Systems Incorporated | Assignment of Assignor's Interest |
| Mar 6, 2009 Reel 22355, frame 331 | Ludwig, Dale L. | Imclone Systems Incorporated | Assignment of Assignor's Interest |
| Mar 6, 2009 Reel 22355, frame 374 | Plymate, Stephen R. | University of Washington | Assignment of Assignor's Interest |
| Mar 12, 2009 Reel 22381, frame 627 | Imclone Systems Incorporated | Imclone LLC | Change of Name |
| Aug 26, 2009 Reel 23149, frame 716 | Ludwig, Dale L.; Loizos, Nick; Huber, Jim | Imclone LLC | Assignment of Assignor's Interest |
| Aug 26, 2009 Reel 23149, frame 814 | Plymate, Stephen R. | University of Washington | Assignment of Assignor's Interest |
| Aug 26, 2009 Reel 23149, frame 956 | Doloff, Nathan Graeme; Fatatis, Alessandro | Philadelphia Health and Education Corporation D/B/A Drexel University College of Medicine | Assignment of Assignor's Interest |
| Nov 14, 2016 Reel 40307, frame 773 | University of Washington | National Institutes of Health - Director Deitr | Confirmatory License |
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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2027
Term ends Dec 20, 2027. No further fees fall due before then
Note
The 549 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
9
later US patents cite this one
That is above the median of utility patents granted in 2012 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.