Lapsed Aug 19, 2026 on the fee record · High confidence
20-year base term ends Mar 15, 2033
Third maintenance fee unpaid; grace period ended.
Filed Mar 15, 2013 as application 13/836,855 · Granted Aug 19, 2014
Base term, 20 years from filing
Today
Lapsed Aug 19, 2026
2013
2033
Clock starts
Mar 15, 2013
Mar 15, 2013
No longer in force
Aug 19, 2026
Aug 19, 2026
Granted
Aug 19, 2014
Aug 19, 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 this application, 13/836,855, was filed | 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 Aug 19, 2026 | High confidence |
| Computed term end | The steps above, in order | Aug 19, 2026 | High confidence |
This family
| US 8,809,259 | this patent Aug 2026 | Aug 2026 |
| Application PCT/US2013/032212 | PCT application no patent term | no patent term |
| US 8,822,412 | Lapsed on the fee record 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 |
|---|---|---|---|
| Aug 12, 2013 Reel 30992, frame 482 | Berry, David Arthur; Boghigian, Brett Adam; Silver, Nathaniel W.; Von Maltzahn, Geoffrey; Chillakuru, Rajeev; Hamill, Mike | Pronutria, Inc. | Assignment of Assignor's Interest |
| Jun 12, 2014 Reel 33087, frame 617 | 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
36
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.