Collateral for a security interest recorded Jul 13, 2021 (The Bank of New York Mellon Trust Company, N.A.).
Term ends Feb 8, 2030 · High confidence
20-year base term ended Mar 3, 2026
Filed Mar 3, 2006 as application 11/367,236 · Granted Apr 10, 2012
Base term plus 1438 days of patent term adjustment (USPTO delay)
Today
2006
2030
Clock starts
Mar 3, 2006
Mar 3, 2006
Term ends
Feb 8, 2030
Feb 8, 2030
Granted
Apr 10, 2012
Apr 10, 2012
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
1,438
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 1438 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 Mar 3, 2006, when this application, 11/367,236, was filed | Mar 3, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1438 days, USPTO patent term adjustment record | Feb 8, 2030 | 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 | Feb 8, 2030 | 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 |
|---|---|---|---|
| May 26, 2006 Reel 17684, frame 205 | Barkdoll, Michael P.; Watkins, Donald M.; Retort, Richard C.; Westbrook, Richard W.; Karnowski, Jerome A.; Ball, Mark A. | Sun Coke Company | Assignment of Assignor's Interest |
| Dec 31, 2007 Reel 20299, frame 827 | Sun Coke Company | Suncoke Energy, Inc. | Change of Name |
| Jan 5, 2011 Reel 25590, frame 485 | Suncoke Energy, Inc. | Suncoke Technology and Development Corp. | Change of Name |
| Jul 18, 2011 Reel 26610, frame 54 | Suncoke Technology and Development Corp. | Suncoke Technology and Development LLC | Change of Name |
| Aug 1, 2011 Reel 26681, frame 429 | Suncoke Energy, Inc. | Jpmorgan Chase Bank, N.a. | Security Agreement |
| Feb 28, 2012 Reel 27771, frame 596 | Sun Coke Company | Suncoke Energy, Inc. | Change of Name |
| Feb 28, 2012 Reel 27771, frame 662 | Suncoke Energy, Inc. | Suncoke Technology and Development Corp. | Change of Name |
| Feb 28, 2012 Reel 27771, frame 721 | Suncoke Technology and Development Corp. | Suncoke Technology and Development LLC | Change of Name |
| May 24, 2017 Reel 42551, frame 937 | JPMorgan Chase Bank, N.A., as Resigning Agent | Bank of America, N.A., as Successor Agent | Notice of Assignment of Security Interest (Intellectual Property) |
| May 24, 2017 Reel 42552, frame 829 | Suncoke Technology and Development LLC | Bank of America, N.A., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Aug 6, 2019 Reel 49967, frame 471 | Bank of America, N.A., as Administrative Agent | Suncoke Technology and Development LLC | Termination and Release of Security Interest in Patents |
| Aug 6, 2019 Reel 49967, frame 505 | Bank of America, N.A., as Successor Administrative Agent to JP Morgan Chase Bank, N.A., as Resigning Agent | Suncoke Technology and Development LLC | Termination and Release of Security Interest in Patents |
| Aug 6, 2019 Reel 49967, frame 579 | Suncoke Technology and Development LLC | Bank of America, N.A., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Jul 13, 2021 Reel 56846, frame 548 | Suncoke Technology and Development LLC | The Bank of New York Mellon Trust Company, N.A., as Collateral 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Feb 2030
Term ends Feb 8, 2030. No further fees fall due before then
Note
The 1438 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
96
later US patents cite this one
That is top 10% of utility patents granted in 2012 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.