Also listed on Reg, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Apr 17, 2029 · High confidence
20-year base term ends Dec 10, 2028
Held by Reg Synthetic Fuels, LLC
Filed Dec 10, 2008 as application 12/331,906 · Granted Jul 31, 2012
Base term plus 790 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2008
2029
Clock starts
Dec 10, 2008
Dec 10, 2008
Term ends
Apr 17, 2029
Apr 17, 2029
Granted
Jul 31, 2012
Jul 31, 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
790
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 10,717,687.
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.
9
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 790 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Dec 10, 2008, when this application, 12/331,906, was filed | Dec 10, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +790 days, USPTO patent term adjustment record | Feb 8, 2031 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,717,687) | capped to Apr 17, 2029 | 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 | Apr 17, 2029 | High confidence |
This family
| US 8,231,804 | this patent Apr 2029 | Apr 2029 |
| US 9,963,401 | In force Jun 2029 | Jun 2029 |
| US 10,717,687 | In force Apr 2029 | Apr 2029 |
| US 11,097,994 | In force Dec 2028 | Dec 2028 |
| US 11,623,899 | In force Dec 2028 | Dec 2028 |
| US 12,516,002 | In force Feb 2029 | Feb 2029 |
| Application 19/412,727 | Pending not computed | not computed |
7 of 9 applications in this family shown, earliest filings first. 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, 2008 Reel 21956, frame 209 | Abhari, Ramin; Tomlinson, H. Lynn; Gruver, Vladimir | Syntroleum Corporation, A Delaware Corporation | Assignment of Assignor's Interest |
| Jun 20, 2014 Reel 33152, frame 676 | Syntroleum Corporation, A Delaware Corporation | Reg Synthetic Fuels, LLC | Assignment of Assignor's Interest |
| Jul 29, 2014 Reel 33430, frame 470 | Syntroleum Corporation | Reg Synthetic Fuels, LLC | Assignment of Assignor's Interest |
| Jun 19, 2021 Reel 56628, frame 673 | Reg Synthetic Fuels, LLC | Umb Bank, N.A., as Collateral Trustee | Patent Security Agreement |
| Jul 1, 2022 reel/frame not recorded | Umb Bank, N.A., as Collateral Trustee | Reg Synthetic Fuels, LLC | Release of Security Interest |
| Jul 1, 2022 reel/frame not recorded | Umb Bank, N.A., as Collateral Trustee | Renewable Energy Group, Inc. | Release of Security Interest |
| Jul 1, 2022 reel/frame not recorded | Umb Bank, N.A., as Collateral Trustee | Reg Seneca, LLC | Release of Security Interest |
| Jul 1, 2022 reel/frame not recorded | Umb Bank, N.A., as Collateral Trustee | Reg Biofuels, LLC | Release of Security Interest |
| Jul 1, 2022 Reel 60562, frame 428 | Umb Bank, N.A., as Collateral Trustee | Reg Synthetic Fuels, LLC; Renewable Energy Group, Inc.; Reg Seneca, LLC; Reg Biofuels, LLC | Release of 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
Apr 2029
Term ends Apr 17, 2029. No further fees fall due before then
Note
The 790 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,717,687.
Citations
39
later US patents cite this one
That is top 25% 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.