Term ends May 15, 2029 · Medium confidence
20-year base term ends May 15, 2029
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,656,951), so the cap could be lower.
Held by Repligen Corporation
Filed May 3, 2021 as application 17/306,513 · Granted Dec 31, 2024
Base term plus 277 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2009
2029
Clock starts
May 15, 2009
May 15, 2009
Term ends
May 15, 2029
May 15, 2029
Granted
Dec 31, 2024
Dec 31, 2024
base term
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
277
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 10,234,044, US 11,022,223, US 11,719,348, US 8,235,067, US 8,656,951, US 9,447,888.
0 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
8
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 277 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 0 of 1 maintenance fees are paid so far. Confidence: Medium. 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 May 15, 2009, when application 12/466,918, the earliest non-provisional in its chain, was filed (this one was filed May 3, 2021) | May 15, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +277 days, USPTO patent term adjustment record | Feb 16, 2030 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,234,044, US 11,022,223, US 11,719,348, US 8,235,067, US 8,656,951, US 9,447,888) | capped to May 15, 2029 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 15, 2029 | Medium confidence |
This family
| US 8,235,067 | Lapsed on the fee record Aug 2024 | Aug 2024 |
| US 8,656,951 | Lapsed on the fee record Feb 2026 | Feb 2026 |
| US 9,447,888 | In force May 2029 | May 2029 |
| US 10,234,044 | In force May 2029 | May 2029 |
| US 11,022,223 | Lapsed on the fee record Jun 2025 | Jun 2025 |
| US 12,181,076 | this patent May 2029 | May 2029 |
| US 12,253,189 | In force May 2029 | May 2029 |
| US 11,719,348 | In force May 2029 | May 2029 |
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 |
|---|---|---|---|
| Sep 19, 2024 Reel 68636, frame 413 | Alphinity, LLC | Repligen Corporation | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2029
Term ends May 15, 2029. Maintenance fees still fall due before then
Note
The 277 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 10,234,044, US 11,022,223, US 11,719,348, US 8,235,067, US 8,656,951, US 9,447,888.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2024 in our data have been cited yet, so we show the count and do not rank on it.
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.