FRX Polymers, Inc.
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
2
Ending by 2030
May 2027
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 Feb 8, 2027The maintenance fee for Nanoparticle Containing Compositions (US 11,718,747) comes due Feb 8, 2027. Unpaid by Aug 9, 2027, it lapses early.
- 1 fee due Sep 22, 2027The maintenance fee for Phosphonate polymers, copolymers, and their respective oligomers as flame retardants for polyester fibers (US 9,290,653) comes due Sep 22, 2027. Unpaid by Mar 22, 2028, it lapses early.
Recent changes
- 1 term has ended 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.
Showing 1 to 7 of 7
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,666,932 | Compositions Comprising Polyphosphonates and Additives That Exhibit an Advantageous Combination of Properties, and Methods Related Thereto In force · High confidence | In force | High confidence | |
| US 7,928,259 | Diaryl alkylphosphonates and methods for preparing same In force · From the USPTO record | In force | From the USPTO record | |
| US 10,724,154 | Phosphonate polymers, copolymers, and their respective oligomers as flame retardants for polyester fibers In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 9,290,653 | Phosphonate polymers, copolymers, and their respective oligomers as flame retardants for polyester fibers In force · From the USPTO record | In force | From the USPTO record | |
| US 10,717,931 | Curing of epoxy resins with phosphonate oligomers In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 10,836,909 | Blends of polyesters and phosphonate oligomers and polymers In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 11,718,747 | Nanoparticle Containing Compositions In force · High confidence | In force | High confidence |
Also on record, not counted in the 7: 1 patent in force now held by others · 21 lapsed for an unpaid fee · 2 ended at full term. List them
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.
1 pending · 6 abandoned · 11 no status recorded