Term ends Jun 4, 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 Oct 10, 2013 as application 14/050,559 · Granted Jun 23, 2015
Base term, 20 years from filing
Today
2008
2028
Clock starts
Jun 4, 2008
Jun 4, 2008
Term ends
Jun 4, 2028
Jun 4, 2028
Granted
Jun 23, 2015
Jun 23, 2015
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,581,013, to Jun 4, 2028. The term already ends on or before that date, so the cap shortened nothing.
2 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 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. 2 of 3 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 Jun 4, 2008, when application 12/132,915, the earliest non-provisional in its chain, was filed (this one was filed Oct 10, 2013); 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 | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,581,013) | resolves to Jun 4, 2028, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 4, 2028 | Medium confidence |
This family
| US 8,581,013 | In force Dec 2028 | Dec 2028 |
| US 8,558,042 | In force Jun 2028 | Jun 2028 |
| US 9,061,951 | this patent 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 |
|---|---|---|---|
| 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
Jun 2028
Term ends Jun 4, 2028. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,581,013, ends no earlier than this term, so it caps nothing.
Citations
8
later US patents cite this one
That is above the median of utility patents granted in 2015 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.