Collateral for a security interest recorded Jul 25, 2025 (Bank of America, N.A.).
Term ends Aug 17, 2032 · Medium confidence
20-year base term ends Aug 17, 2032
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 10,947,455, US 11,692,138), so the cap could be lower.
Filed May 22, 2023 as application 18/321,530 · Granted Jan 14, 2025
Base term, 20 years from filing
Today
2012
2032
Clock starts
Aug 17, 2012
Aug 17, 2012
Term ends
Aug 17, 2032
Aug 17, 2032
Granted
Jan 14, 2025
Jan 14, 2025
base term
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 10,947,455, US 11,692,138, to Aug 17, 2032. The term already ends on or before that date, so the cap shortened nothing.
0 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it 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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 0 of 1 maintenance fees are paid so far. Confidence: Medium. 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 Aug 17, 2012, when application 13/589,009, the earliest non-provisional in its chain, was filed (this one was filed May 22, 2023) | Aug 17, 2032 | 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 10,947,455, US 11,692,138) | resolves to Aug 17, 2032, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 17, 2032 | Medium confidence |
This family
| US 9,359,554 | In force no later than Nov 2034 | no later than Nov 2034 |
| Application PCT/US2013/054703 | PCT application no patent term | no patent term |
| US 10,947,455 | In force no later than Aug 2032 | no later than Aug 2032 |
| US 11,692,138 | In force no later than Aug 2032 | no later than Aug 2032 |
| US 12,195,671 | this patent Aug 2032 | Aug 2032 |
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 |
|---|---|---|---|
| Jan 12, 2024 Reel 66107, frame 910 | Quanci, John F.; Chun, Peter U.; Kaplarevic, Milos J.; Reiling, Vince G. | Suncoke Technology and Development LLC | Assignment of Assignor's Interest |
| Jul 25, 2025 Reel 72254, frame 272 | Suncoke Technology and Development LLC | Bank of America, N.A., as Administrative Agent | Security 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.
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Alerts on its grants, lapses and transfers.
What's changing
Aug 2032
Term ends Aug 17, 2032. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,947,455, US 11,692,138, ends no earlier than this term, so it caps nothing.
Citations
4
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.