Term ends Mar 31, 2029 · High confidence
20-year base term ends Mar 31, 2029
Held by Zymeflow, Inc.
Filed Jun 14, 2017 as application 15/623,112 · Granted Sep 4, 2018
Base term, 20 years from filing
Today
2009
2029
Clock starts
Mar 31, 2009
Mar 31, 2009
Term ends
Mar 31, 2029
Mar 31, 2029
Granted
Sep 4, 2018
Sep 4, 2018
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 8,702,994, US 9,682,878, to Mar 31, 2029. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. 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.
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. 2 of 2 maintenance fees are paid so far. 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 31, 2009, when application 12/415,283, the earliest non-provisional in its chain, was filed (this one was filed Jun 14, 2017) | Mar 31, 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 resolved from the filed document (refs US 8,702,994, US 9,682,878) | resolves to Mar 31, 2029, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 31, 2029 | High confidence |
This family
| US 8,702,994 | In force Oct 2031 | Oct 2031 |
| US 9,682,878 | In force Mar 2029 | Mar 2029 |
| US 10,065,874 | this patent Mar 2029 | Mar 2029 |
| US 10,723,641 | In force Mar 2029 | Mar 2029 |
| US 11,383,994 | In force Mar 2029 | Mar 2029 |
| US 12,391,588 | In force no later than May 2030 | no later than May 2030 |
| Application 19/270,401 | Pending 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 |
|---|---|---|---|
| Jul 23, 2018 Reel 46430, frame 965 | Frost, Jack G.; Snyder, Kenneth J., JR. | 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
Mar 2029
Term ends Mar 31, 2029. No further fees fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,702,994, US 9,682,878, ends no earlier than this term, so it caps nothing.
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2018 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.