Lapsed Feb 25, 2026 on the fee record · Medium confidence
20-year base term ends May 15, 2029
Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.
Third maintenance fee unpaid; grace period ended.
Held by Repligen Corporation
Filed Jul 20, 2012 as application 13/554,983 · Granted Feb 25, 2014
Base term, 20 years from filing
Today
Lapsed Feb 25, 2026
2009
2029
Clock starts
May 15, 2009
May 15, 2009
No longer in force
Feb 25, 2026
Feb 25, 2026
Granted
Feb 25, 2014
Feb 25, 2014
Term would have run to
May 15, 2029
May 15, 2029
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
2 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.
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 on file with no resolved reference, so no cap is applied and none is guessed. 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 Jul 20, 2012) | 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 on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Feb 25, 2026 | High confidence |
| Computed term end | The steps above, in order | Feb 25, 2026 | Medium confidence |
This family
| US 8,235,067 | Lapsed on the fee record Aug 2024 | Aug 2024 |
| US 8,656,951 | this patent 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 | 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 |
|---|---|---|---|
| Feb 23, 2015 Reel 35006, frame 259 | Alphabio, Inc. | Alphinity, LLC | Assignment of Assignor's Interest |
| 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Feb 25, 2026. We will not guess the cap.
Citations
21
later US patents cite this one
That is top 25% of utility patents granted in 2014 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.