Term ends Feb 21, 2032 · Medium confidence
20-year base term ends Feb 21, 2032
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 9,512,019), so the cap could be lower.
Held by Zymeflow, Inc.
Filed Feb 20, 2018 as application 15/900,541 · Granted Jan 7, 2020
Base term, 20 years from filing
Today
2012
2032
Clock starts
Feb 21, 2012
Feb 21, 2012
Term ends
Feb 21, 2032
Feb 21, 2032
Granted
Jan 7, 2020
Jan 7, 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 10,093,869, US 10,731,089, US 8,993,488, US 9,512,019, US 9,815,720, US 9,920,236, to Feb 21, 2032. 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.
5
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 Feb 21, 2012, when application 13/401,336, the earliest non-provisional in its chain, was filed (this one was filed Feb 20, 2018) | Feb 21, 2032 | 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 10,093,869, US 10,731,089, US 8,993,488, US 9,512,019, US 9,815,720, US 9,920,236) | resolves to Feb 21, 2032, no earlier than this term, so no change | Medium 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 | Feb 21, 2032 | Medium confidence |
This family
| US 8,993,488 | Lapsed on the fee record Mar 2023 | Mar 2023 |
| Application PCT/US2012/026172 | PCT application no patent term | no patent term |
| US 9,920,236 | In force Sep 2032 | Sep 2032 |
| US 10,526,527 | this patent Feb 2032 | Feb 2032 |
| US 11,236,262 | In force Feb 2032 | Feb 2032 |
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 |
|---|---|---|---|
| Jul 25, 2019 Reel 49865, frame 995 | Matza, Stephen D.; Smith, Martha T.; Frost, Jack G. | United Laboratories International, LLC | Assignment of Assignor's Interest |
| Mar 12, 2025 Reel 70491, frame 243 | United Laboratories International, LLC | Tristar Global Energy Solutions, Inc. | Merger |
| Mar 13, 2025 Reel 70508, frame 396 | Tristar Global Energy Solutions, Inc. | CR3 Zymeflow, Inc. | Merger |
| Mar 15, 2025 Reel 70523, frame 169 | CR3 Zymeflow, Inc. | Zymeflow, Inc. | Merger |
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
Feb 2032
Term ends Feb 21, 2032. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,093,869, US 10,731,089, US 8,993,488, US 9,512,019, US 9,815,720, US 9,920,236, ends no earlier than this term, so it caps nothing.
Citations
3
later US patents cite this one
That is above the median 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.