SixRing Inc.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Feb 2041
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 1 fee due Dec 6, 2026The maintenance fee for Use of a 2 liquid phase system in biomass delignification (US 11,668,047) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
- 1 fee due Mar 19, 2027The maintenance fee for Modified Sulfuric Acid and Uses Thereof (US 11,760,720) comes due Mar 19, 2027. Unpaid by Sep 20, 2027, it lapses early.
- 1 fee due May 21, 2027The maintenance fee for Novel Approach to Biomass Delignification (US 11,821,139) comes due May 21, 2027. Unpaid by Nov 22, 2027, it lapses early.
- 1 fee due Jun 19, 2027The maintenance fee for Modified Sulfuric Acid and Uses Thereof (US 11,846,067) comes due Jun 19, 2027. Unpaid by Dec 20, 2027, it lapses early.
- 2 fees due Aug 20, 2027
- 1 fee due Oct 23, 2027The maintenance fee for Modified sulfuric acid and uses thereof (US 11,965,289) comes due Oct 23, 2027. Unpaid by Apr 24, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 12,320,066 | Modified Sulfuric Acid and Uses Thereof In force · High confidence | In force | High confidence | |
| US 11,760,720 | Modified Sulfuric Acid and Uses Thereof In force · High confidence | In force | High confidence | |
| US 11,846,067 | Modified Sulfuric Acid and Uses Thereof In force · High confidence | In force | High confidence | |
| US 11,668,047 | Use of a 2 liquid phase system in biomass delignification In force · From the USPTO record | In force | From the USPTO record | |
| US 11,821,139 | Novel Approach to Biomass Delignification In force · High confidence | In force | High confidence | |
| US 12,692,653 | Approach to Biomass Delignification In force · Low confidence | In force | Low confidence | |
| US 12,709,765 | Cellulose for Bioethanol Production In force · High confidence | In force | High confidence | |
| US 11,905,171 | Modified Sulfuric Acid and Uses Thereof In force · High confidence | In force | High confidence | |
| US 12,234,604 | Modified sulfuric acid and uses thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 12,270,151 | Modified sulfuric acid and uses thereof In force · From the USPTO record | In force | From the USPTO record |
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
13 pending · 5 no status recorded