Term ends Feb 21, 2037 · High confidence
20-year base term ends Feb 21, 2037
Held by Waters Technologies Corporation
Filed Feb 21, 2017 as application 15/438,092 · Granted Nov 29, 2022
Base term, 20 years from filing
Today
2017
2037
Clock starts
Feb 21, 2017
Feb 21, 2017
Term ends
Feb 21, 2037
Feb 21, 2037
Granted
Nov 29, 2022
Nov 29, 2022
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.
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. 1 of 3 maintenance fees is 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 Feb 21, 2017, when this application, 15/438,092, was filed | Feb 21, 2037 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 21, 2037 | High confidence |
This family
| US 11,513,333 | this patent Feb 2037 | Feb 2037 |
| US 11,035,795 | In force Feb 2037 | Feb 2037 |
| US 11,874,228 | In force Feb 2037 | Feb 2037 |
| US 12,007,548 | In force Feb 2037 | Feb 2037 |
| Application 18/193,946 | 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 23, 2018 Reel 46671, frame 448 | Ashcroft, Colby; Dipaolo, Brian; Konica, Gjergji; Castner, Thomas; Cordovez, Bernardo; Earhart, Chris; Erickson, David; Hart, Robert | Optofluidics Inc. | Assignment of Assignor's Interest |
| Oct 28, 2025 Reel 72708, frame 297 | Optofluidics, Inc. | Waters Technologies Corporation | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Feb 2037
Term ends Feb 21, 2037. Maintenance fees still fall due before then
Citations
25
later US patents cite this one
That is top 5% of utility patents granted in 2022 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.