Also listed on Immunas Pharma, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 22, 2030 · High confidence
20-year base term ends Aug 9, 2030
Held by Oncotherapy Science, Inc.
Filed Aug 9, 2010 as application 12/852,548 · Granted Dec 18, 2012
Base term plus 44 days of patent term adjustment (USPTO delay)
Today
2010
2030
Clock starts
Aug 9, 2010
Aug 9, 2010
Term ends
Sep 22, 2030
Sep 22, 2030
Granted
Dec 18, 2012
Dec 18, 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
44
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 44 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 9, 2010, when this application, 12/852,548, was filed | Aug 9, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +44 days, USPTO patent term adjustment record | Sep 22, 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 | Sep 22, 2030 | High confidence |
This family
| US 8,333,967 | this patent Sep 2030 | Sep 2030 |
| US 9,181,332 | In force Sep 2030 | Sep 2030 |
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 |
|---|---|---|---|
| Nov 3, 2010 Reel 25242, frame 562 | Kubota, Tsuguo; Suzuki, Nobuyuki | Kyowa Hakko Kirin Co., Ltd. | Assignment of Assignor's Interest |
| Oct 23, 2019 Reel 50797, frame 533 | Kyowa Hakko Kirin Co., Ltd. | Kyowa Kirin Co., Ltd. | Change of Name and Address |
| Jan 2, 2024 Reel 65998, frame 142 | Kyowa Kirin Co., Ltd. | Immunas Pharma, Inc. | Nunc Pro Tunc Assignment |
| Mar 26, 2025 Reel 70641, frame 569 | Immunas Pharma, Inc. | Oncotherapy Science, Inc. | Merger |
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
Sep 2030
Term ends Sep 22, 2030. No further fees fall due before then
Note
The 44 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites this one
That is below 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.