Lapsed Sep 2, 2026 on the fee record · High confidence
20-year base term ends Mar 15, 2033
Third maintenance fee unpaid; grace period ended.
Filed Mar 19, 2014 as application 14/219,943 · Granted Sep 2, 2014
Base term, 20 years from filing
Today
Lapsed Sep 2, 2026
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
No longer in force
Sep 2, 2026
Sep 2, 2026
Granted
Sep 2, 2014
Sep 2, 2014
Term would have run to
Mar 15, 2033
Mar 15, 2033
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.
None
Terminal disclaimer
No disclaimer on this record.
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.
7
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 Mar 15, 2033: its 20-year base term, with no adjustment for prosecution delay. 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 Mar 15, 2013, when application 13/836,855, the earliest non-provisional in its chain, was filed (this one was filed Mar 19, 2014) | Mar 15, 2033 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Sep 2, 2026 | High confidence |
| Computed term end | The steps above, in order | Sep 2, 2026 | High confidence |
This family
| US 8,809,259 | Lapsed on the fee record Aug 2026 | Aug 2026 |
| Application PCT/US2013/032212 | PCT application no patent term | no patent term |
| US 8,822,412 | this patent Sep 2026 | Sep 2026 |
| US 9,611,298 | In force Mar 2033 | Mar 2033 |
| US 10,450,350 | In force Mar 2033 | Mar 2033 |
| Application 16/566,734 | Abandoned not computed | not computed |
| Application 18/378,229 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Jun 10, 2014 Reel 33064, frame 197 | Berry, David Arthur; Boghigian, Brett Adam; Silver, Nathaniel W.; Von Maltzahn, Geoffrey; Hamill, Michael; Chillakuru, Rajeev | Pronutria, Inc. | Assignment of Assignor's Interest |
| Jul 18, 2014 Reel 33341, frame 773 | Kramarczyk, John F. | Pronutria, Inc. | Assignment of Assignor's Interest |
| Mar 19, 2016 Reel 38177, frame 982 | Pronutria, Inc. | Pronutria Biosciences, Inc. | Assignment of Assignor's Interest |
| Oct 6, 2016 Reel 40249, frame 741 | Pronutria Biosciences, Inc. | Axcella Health Inc. | Assignment of Assignor's Interest |
| Sep 2, 2021 Reel 57435, frame 136 | Axcella Health Inc. | SLR Investment Corp., as Agent | Intellectual Property Security Agreement |
| Dec 15, 2022 Reel 62137, frame 569 | SLR Investment Corp. | Axcella Health Inc. | Release of Security Interest |
| Dec 20, 2023 Reel 66125, frame 228 | Axcella Health Inc. | Axcella (Assignment for the Benefit of Creditors), LLC | 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.
Citations
19
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.