Term ends Dec 10, 2028 · Medium confidence
20-year base term ends Dec 10, 2028
Why Medium: A parent in the chain could not be resolved.
Held by Reg Synthetic Fuels, LLC
Filed Jun 9, 2020 as application 16/896,486 · Granted Aug 24, 2021
Base term, 20 years from filing
Today
2008
2028
Clock starts
Dec 10, 2008
Dec 10, 2008
Term ends
Dec 10, 2028
Dec 10, 2028
Granted
Aug 24, 2021
Aug 24, 2021
base term
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
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 is its 20-year base term, with no adjustment for prosecution delay. 1 of 1 maintenance fees is 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 Dec 10, 2008, when application 12/331,906, the earliest non-provisional in its chain, was filed (this one was filed Jun 9, 2020); a parent in its chain could not be resolved (the next row) | Dec 10, 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 | None on file | no change | 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 | 1 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 10, 2028 | Medium confidence |
This family
| US 8,231,804 | In force 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 | this patent 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 |
|---|---|---|---|
| Jun 19, 2021 Reel 56628, frame 673 | Reg Synthetic Fuels, LLC | Umb Bank, N.A., as Collateral Trustee | Patent Security Agreement |
| Jul 20, 2021 Reel 56919, frame 136 | Abhari, Ramin; Tomlinson, H. Lynn; Gruver, Vladimir | Syntroleum Corporation | Assignment of Assignor's Interest |
| Jul 20, 2021 Reel 56919, frame 283 | Syntroleum Corporation | Reg Synthetic Fuels, LLC | Assignment of Assignor's Interest |
| 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.
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Alerts on its grants, lapses and transfers.
What's changing
Dec 2028
Term ends Dec 10, 2028. No further fees fall due before then
Citations
2
later US patents cite this one
That is above the median of utility patents granted in 2021 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.