San-Apro Ltd.
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.
3
Ending by 2030
Feb 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 Dec 2, 2026The maintenance fee for Sulfonium Salt and Photo-Acid Generator (US 9,045,398) comes due Dec 2, 2026. Unpaid by Jun 2, 2027, it lapses early.
- 1 fee due Apr 22, 2027The maintenance fee for Sulfonate compound, photoacid generator, and resin composition for photolithography (US 10,450,266) comes due Apr 22, 2027. Unpaid by Oct 22, 2027, it lapses early.
- 1 fee due Sep 12, 2027The maintenance fee for Sulfonium salt, photoacid generator, curable composition, and resist composition (US 11,926,581) comes due Sep 12, 2027. Unpaid by Mar 13, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was 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 7,709,598 | Fluorinated alkyl fluorophoshoric acid salts of onium and transition metal complex In force · From the USPTO record | In force | From the USPTO record | |
| US 8,278,030 | Sulfonium salt, photoacid generator, and photocurable composition and cured body thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 8,617,787 | Sulfonium salt, photo-acid generator, and photosensitive resin composition In force · From the USPTO record | In force | From the USPTO record | |
| US 9,045,398 | Sulfonium Salt and Photo-Acid Generator In force · High confidence | In force | High confidence | |
| US 10,450,266 | Sulfonate compound, photoacid generator, and resin composition for photolithography In force · From the USPTO record | In force | From the USPTO record | |
| US 10,683,266 | Sulfonium salt, photoacid generator, photocurable composition, and cured product thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 11,370,751 | Sulfonium salt, heat- or photo-acid generator, heat- or photo-curable composition, and cured product thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 11,926,581 | Sulfonium salt, photoacid generator, curable composition, and resist composition In force · From the USPTO record | In force | From the USPTO record | |
| US 12,129,240 | Sulfonium Salt, Photoacid Generator, Curable Composition and Resist Composition In force · High confidence | In force | High confidence | |
| US 12,461,444 | Sulfonium Salt, Photoacid Generator, Curable Composition, and Resist Composition In force · High confidence | In force | High confidence |
Also on record, not counted in the 12: 1 patent in force now held by others · 3 lapsed for an unpaid fee · 9 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.
4 no status recorded