Term ends Apr 22, 2038 · High confidence
20-year base term ends Jan 26, 2037
Held by Elmet Technologies, LLC
Filed Jan 26, 2017 as application 15/416,253 · Granted Jun 2, 2020
Base term plus 451 days of patent term adjustment (USPTO delay)
Today
2017
2038
Clock starts
Jan 26, 2017
Jan 26, 2017
Term ends
Apr 22, 2038
Apr 22, 2038
Granted
Jun 2, 2020
Jun 2, 2020
base term
patent term adjustment
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
451
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 11,077,524, to Apr 22, 2038. 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.
3
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 runs 451 days past its 20-year base term on 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: 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 Jan 26, 2017, when this application, 15/416,253, was filed | Jan 26, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +451 days, USPTO patent term adjustment record | Apr 22, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,077,524) | resolves to Apr 22, 2038, 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 | Apr 22, 2038 | High confidence |
This family
| US 10,668,566 | this patent Apr 2038 | Apr 2038 |
| US 11,198,197 | In force Jan 2037 | Jan 2037 |
| Application 17/525,110 | 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 |
|---|---|---|---|
| Dec 10, 2019 Reel 51228, frame 12 | Smathers, David B.; Hogan, Patrick; Stawovy, Michael Thomas; Winnicka, Maria B.; Rozak, Gary A. | H.C. Starck Inc. | Assignment of Assignor's Interest |
| Oct 31, 2023 Reel 65402, frame 530 | H.C. Starck Inc. | Coldwater Facility Holding, LLC | Assignment of Assignor's Interest |
| Nov 1, 2023 Reel 65415, frame 744 | Coldwater Facility Holding, LLC | H.C. Starck Solutions Coldwater, LLC | Change of Name |
| Nov 6, 2023 Reel 65472, frame 843 | H.C. Starck Solutions Coldwater, LLC; H.C. Starck Solutions Euclid, LLC | Wells Fargo Bank, National Association | Security Interest |
| Feb 3, 2026 Reel 73679, frame 616 | H.C. Starck Solutions Coldwater, LLC | Elmet Technologies, 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Apr 2038
Term ends Apr 22, 2038. Maintenance fees still fall due before then
Note
The 451 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 11,077,524, ends no earlier than this term, so it caps nothing.
Citations
38
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.