Collateral for a security interest recorded Jul 30, 2025 (Western Alliance Bank).
Term ends Jun 24, 2036 · Medium confidence
20-year base term ends Jun 24, 2036
Why Medium: A parent in the chain could not be resolved.
Held by Native Microbials, Inc.
Filed Dec 28, 2016 as application 15/392,913 · Granted Dec 1, 2020
Base term, 20 years from filing
Today
2016
2036
Clock starts
Jun 24, 2016
Jun 24, 2016
Term ends
Jun 24, 2036
Jun 24, 2036
Granted
Dec 1, 2020
Dec 1, 2020
base term
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,844,419, US 10,870,877, US 9,540,676, US 9,938,558, to Jun 24, 2036. The term already ends on or before that date, so the cap shortened nothing.
1 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.
35
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 is 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. 1 of 3 maintenance fees is 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 Jun 24, 2016, when application PCT/US2016/039221, the earliest non-provisional in its chain, was filed (this one was filed Dec 28, 2016); a parent in its chain could not be resolved (the next row) | Jun 24, 2036 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,844,419, US 10,870,877, US 9,540,676, US 9,938,558) | resolves to Jun 24, 2036, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 24, 2036 | Medium confidence |
This family
| US 9,540,676 | In force Jun 2036 | Jun 2036 |
| US 10,844,419 | In force Jun 2036 | Jun 2036 |
| US 10,851,399 | this patent Jun 2036 | Jun 2036 |
| Application PCT/US2017/012573 | PCT application no patent term | no patent term |
| US 9,938,558 | In force Jun 2036 | Jun 2036 |
| US 10,870,877 | In force Jun 2036 | Jun 2036 |
| US 10,398,154 | In force Jan 2037 | Jan 2037 |
| US 10,632,157 | In force Apr 2037 | Apr 2037 |
8 of 35 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jan 27, 2017 Reel 41100, frame 879 | Embree, Mallory; Zengler, Karsten | Ascus Biosciences, Inc. | Assignment of Assignor's Interest |
| Sep 9, 2020 Reel 53732, frame 496 | Ascus Biosciences, Inc. | Native Microbials, Inc. | Change of Name |
| Jul 30, 2025 Reel 72324, frame 1 | Native Microbials, Inc. | Western Alliance Bank | Security 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
Jun 2036
Term ends Jun 24, 2036. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,844,419, US 10,870,877, US 9,540,676, US 9,938,558, ends no earlier than this term, so it caps nothing.
Citations
41
later US patents cite this one
That is top 5% of utility patents granted in 2020 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.