Collateral for a security interest recorded Dec 27, 2022 (Owl Rock Opportunistic Master Fund I, L.P.).
Term ends Aug 18, 2028 · High confidence
20-year base term ends Jun 22, 2027
Held by ADC Therapeutics S.A.
Filed Nov 6, 2009 as application 12/305,648 · Granted Jul 10, 2012
Base term plus 423 days of patent term adjustment (USPTO delay)
Today
2007
2028
Clock starts
Jun 22, 2007
Jun 22, 2007
Term ends
Aug 18, 2028
Aug 18, 2028
Granted
Jul 10, 2012
Jul 10, 2012
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
423
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.
38
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 423 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 22, 2007, when application PCT/CA2007/001134, the earliest non-provisional in its chain, was filed (this one was filed Nov 6, 2009) | Jun 22, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +423 days, USPTO patent term adjustment record | Aug 18, 2028 | 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 | Aug 18, 2028 | High confidence |
This family
| Application 19/598,121 | Pending not computed | not computed |
| US 7,947,436 | Lapsed on the fee record May 2015 | May 2015 |
| US 8,044,179 | Term ended Nov 2026 | Nov 2026 |
| US 8,216,582 | this patent Aug 2028 | Aug 2028 |
| US 8,426,562 | Term ended Nov 2026 | Nov 2026 |
| Application 13/082,107 | Abandoned not computed | not computed |
| US 9,855,291 | Lapsed on the fee record Jan 2026 | Jan 2026 |
| US 8,580,257 | Lapsed on the fee record Nov 2025 | Nov 2025 |
8 of 38 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 |
|---|---|---|---|
| Dec 18, 2008 Reel 22005, frame 351 | Sooknanan, Roy Rabindranauth; Tremblay, Gilles Bernard; Filion, Mario | Alethia Biotherapeutics Inc. | Assignment of Assignor's Interest |
| Jun 30, 2017 Reel 42880, frame 186 | Alethia Biotherapeutics Inc. | ADC Therapeutics S.A. | Assignment of Assignor's Interest |
| May 19, 2020 Reel 52696, frame 247 | ADC Therapeutics S.A. | Deerfield Partners, L.P., as Grantee | Security Interest |
| Jun 29, 2020 Reel 53080, frame 309 | ADC Therapeutics S.A. | Deerfield Partners, L.p. | IP Pledge Agreement |
| Aug 16, 2022 Reel 61200, frame 750 | Deerfield Partners, L.p. | ADC Therapeutics S.A. | Termination and Release of Patent Security Agreement |
| Dec 27, 2022 Reel 62228, frame 763 | ADC Therapeutics S.A. | Owl Rock Opportunistic Master Fund I, L.P. | Patent Security Agreement |
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
Aug 2028
Term ends Aug 18, 2028. No further fees fall due before then
Note
The 423 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
39
later US patents cite this one
That is top 25% 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.