Term ends Jul 7, 2028 · High confidence
20-year base term ended Oct 20, 2025
Held by Elmet Technologies, LLC
Filed Nov 2, 2010 as application 12/917,668 · Granted Dec 16, 2014
Base term plus 991 days of patent term adjustment (USPTO delay)
Today
2005
2028
Clock starts
Oct 20, 2005
Oct 20, 2005
Term ends
Jul 7, 2028
Jul 7, 2028
Granted
Dec 16, 2014
Dec 16, 2014
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
991
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
2
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 991 days past its 20-year base term on prosecution delay. 2 of 3 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 Oct 20, 2005, when application 11/255,018, the earliest non-provisional in its chain, was filed (this one was filed Nov 2, 2010) | Oct 20, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +991 days, USPTO patent term adjustment record | Jul 7, 2028 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 7, 2028 | High confidence |
This family
| US 7,837,929 | Term ended Oct 2025 | Oct 2025 |
| US 8,911,528 | this patent Jul 2028 | Jul 2028 |
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 |
|---|---|---|---|
| Mar 31, 2016 Reel 38311, frame 460 | H.C. Starck Inc. | Glas Trust Corporation Limited, as Security Agent for the Benefit of the Senior Secured Parties | Security Interest |
| Mar 31, 2016 Reel 38311, frame 472 | H.C. Starck Inc. | Glas Trust Corporation Limited, as Security Agent for the Benefit of the Second Lien Secured Parties | Security Interest |
| Sep 1, 2017 Reel 43468, frame 924 | Gaydos, Mark E.; Kumar, Prabhat; Miller, Steve; Mills, Norman C.; Rozak, Gary; Shields, John A.; Wu, Rong-chein Richard | H.C. Starck Inc. | Assignment of Assignor's Interest |
| Nov 2, 2021 Reel 58769, frame 242 | Glas Trust Corporation Limited | H.C. Starck Inc. | Release of Security 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
Jul 2028
Term ends Jul 7, 2028.
Note
The 991 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
12
later US patents cite this one
That is above the median of utility patents granted in 2014 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.