Lapsed Jun 1, 2025 on the fee record · 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.
First maintenance fee unpaid; grace period ended.
Held by Repligen Corporation
Filed Feb 5, 2019 as application 16/267,997 · Granted Jun 1, 2021
Base term, 20 years from filing
Today
Lapsed Jun 1, 2025
2009
2029
Clock starts
May 15, 2009
May 15, 2009
No longer in force
Jun 1, 2025
Jun 1, 2025
Granted
Jun 1, 2021
Jun 1, 2021
Term would have run to
May 15, 2029
May 15, 2029
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,656,951, US 9,447,888, to May 15, 2029. The term already ends on or before that date, so the cap shortened nothing.
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.
Its term would have run to May 15, 2029: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Feb 5, 2019) | May 15, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,656,951, US 9,447,888) | resolves to May 15, 2029, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 1 maintenance fees paid | lapsed Jun 1, 2025 | High confidence |
| Computed term end | The steps above, in order | Jun 1, 2025 | 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 | this patent Jun 2025 | Jun 2025 |
| US 12,181,076 | In force 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 |
|---|---|---|---|
| Oct 25, 2020 Reel 54203, frame 152 | Alpha Bio, Inc. | Alphinity, LLC | Confirmatory Assignment |
| Dec 8, 2020 Reel 54580, frame 754 | Alphinity, LLC | Repligen Corporation | Assignment of Assignor's Interest |
| 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.
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Alerts on its grants, lapses and transfers.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,656,951, US 9,447,888, ends no earlier than this term, so it caps nothing.
Citations
4
later US patents cite this one
That is above the median of utility patents granted in 2021 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.