Also listed on Reg, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 19, 2028 · Medium confidence
20-year base term ends Jun 4, 2028
Why Medium: A parent in the chain could not be resolved.
Held by Reg Synthetic Fuels, LLC
Filed Aug 2, 2011 as application 13/196,768 · Granted Nov 12, 2013
Base term plus 198 days of patent term adjustment (USPTO delay)
Today
2008
2028
Clock starts
Jun 4, 2008
Jun 4, 2008
Term ends
Dec 19, 2028
Dec 19, 2028
Granted
Nov 12, 2013
Nov 12, 2013
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
198
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.
6
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 198 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Jun 4, 2008, when application 12/132,915, the earliest non-provisional in its chain, was filed (this one was filed Aug 2, 2011); a parent in its chain could not be resolved (the next row) | Jun 4, 2028 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +198 days, USPTO patent term adjustment record | Dec 19, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 19, 2028 | Medium confidence |
This family
| US 8,581,013 | this patent Dec 2028 | Dec 2028 |
| US 8,558,042 | In force Jun 2028 | Jun 2028 |
| US 9,061,951 | In force Jun 2028 | Jun 2028 |
| US 9,133,080 | In force Jun 2028 | Jun 2028 |
4 of 6 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 |
|---|---|---|---|
| Aug 2, 2011 Reel 26690, frame 76 | Abhari, Ramin; Roth, Gary; Tomlinson, H. Lynn | Syntroleum Corporation | 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
Dec 2028
Term ends Dec 19, 2028. No further fees fall due before then
Note
The 198 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
36
later US patents cite this one
That is top 25% of utility patents granted in 2013 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.