Term ends May 13, 2029 · High confidence
20-year base term ended Jan 18, 2026
Held by Elmet Technologies, LLC
Filed Jan 18, 2006 as application 11/334,140 · Granted Jul 13, 2010
Base term plus 1211 days of patent term adjustment (USPTO delay)
Today
2006
2029
Clock starts
Jan 18, 2006
Jan 18, 2006
Term ends
May 13, 2029
May 13, 2029
Granted
Jul 13, 2010
Jul 13, 2010
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
1,211
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
This patent's term runs 1211 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 18, 2006, when this application, 11/334,140, was filed | Jan 18, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1211 days, USPTO patent term adjustment record | May 13, 2029 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 13, 2029 | High confidence |
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 |
|---|---|---|---|
| Apr 10, 2006 Reel 17770, frame 303 | McHugh, Lawrence F.; Kumar, Prabhat; Meendering, David; Wu, Richard; Woetting, Gerhard; Nicholson, Richard | H. C. Starck Inc. | Assignment of Assignor's Interest |
| Mar 8, 2012 Reel 27831, frame 415 | H.C. Starck Inc. | Dresdner Bank AG, Niederlassung Luxembourg, as Security Agent | Intellectual Property Rights Security Agreement (SENIOR) |
| Mar 8, 2012 Reel 27831, frame 431 | H.C. Starck Inc. | Dresdner Bank AG, Niederlassung Luxembourg, as Security Agent | Intellectual Property Rights Security Agreement (MEZZANINE) |
| Mar 8, 2012 Reel 27831, frame 448 | H.C. Starck Inc. | Dresdner Bank AG, Niederlassung Luxembourg, as Security Agent | Intellectual Property Rights Security Agreement (Second Lien) |
| 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 |
| 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
May 2029
Term ends May 13, 2029. No further fees fall due before then
Note
The 1211 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
later US patents cite this one
That is above the median of utility patents granted in 2010 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.