Collateral for a security interest recorded Dec 27, 2022 (Owl Rock Opportunistic Master Fund I, L.P.).
Term ends Oct 11, 2033 · High confidence
20-year base term ends Oct 11, 2033
Held by MedImmune Limited
Filed Feb 15, 2018 as application 15/897,835 · Granted Sep 22, 2020
Base term plus 97 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2013
2033
Clock starts
Oct 11, 2013
Oct 11, 2013
Term ends
Oct 11, 2033
Oct 11, 2033
Granted
Sep 22, 2020
Sep 22, 2020
base term
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
97
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 9,889,207.
1 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.
4
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 97 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 3 maintenance fees is 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 Oct 11, 2013, when application PCT/EP2013/071346, the earliest non-provisional in its chain, was filed (this one was filed Feb 15, 2018) | Oct 11, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +97 days, USPTO patent term adjustment record | Jan 16, 2034 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,889,207) | capped to Oct 11, 2033 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 11, 2033 | High confidence |
This family
| US 9,931,414 | In force Apr 2035 | Apr 2035 |
| US 10,780,181 | this patent Oct 2033 | Oct 2033 |
| US 11,771,775 | In force Oct 2033 | Oct 2033 |
3 of 4 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 3, 2019 Reel 51165, frame 741 | Howard, Philip Wilson | MedImmune Limited | Assignment of Assignor's Interest |
| Dec 3, 2019 Reel 51165, frame 855 | Van Berkel, Patricius Hendrikus Cornelis | A.T. Development Switzerland Sàrl | Assignment of Assignor's Interest |
| Dec 5, 2019 Reel 51194, frame 1 | A.T. Development Switzerland Sàrl | ADC Therapeutics S.A. | Assignment of Assignor's Interest |
| Apr 2, 2020 Reel 52299, frame 789 | ADC Therapeutics S.A. | MedImmune Limited | 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 10, 2020 Reel 52898, frame 152 | ADC Therapeutics S.A. | Deerfield Partners, L.p. | Security Interest |
| 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
Oct 2033
Term ends Oct 11, 2033. Maintenance fees still fall due before then
Note
The 97 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 9,889,207.
Citations
2
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.