Sachem, Inc.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
4
Ending by 2030
Apr 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 Jan 28, 2027The maintenance fee for Quaternary ammonium hydroxides (US 9,090,859) comes due Jan 28, 2027. Unpaid by Jul 28, 2027, it lapses early.
- 1 fee due Feb 25, 2027The maintenance fee for Process for improved recovery of onium hydroxide from compositions containing process residues (US 9,115,050) comes due Feb 25, 2027. Unpaid by Aug 25, 2027, it lapses early.
- 1 fee due Jul 30, 2027The maintenance fee for Green Cationization Agent (US 11,884,753) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
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 7,632,409 | Cation-Exchange Displacement Chromatography Process and Cationic Organic Compounds for Use as Displacer Compounds in Cation-Exchange Displacement Chromatography Process In force · Medium confidence | In force | Medium confidence | |
| US 7,572,379 | Removal of Metal Ions from Onium Hydroxides and Onium Salt Solutions In force · High confidence | In force | High confidence | |
| US 7,867,471 | Process for preparing advanced ceramic powders using onium dicarboxylates In force · From the USPTO record | In force | From the USPTO record | |
| US 7,976,638 | High negative zeta potential polyhedral silsesquioxane composition and method for damage free semiconductor wet clean In force · From the USPTO record | In force | From the USPTO record | |
| US 8,361,779 | Buffer compounds In force · From the USPTO record | In force | From the USPTO record | |
| US 9,650,595 | Quaternary ammonium hydroxides In force · From the USPTO record | In force | From the USPTO record | |
| US 9,090,859 | Quaternary ammonium hydroxides In force · From the USPTO record | In force | From the USPTO record | |
| US 9,115,050 | Process for improved recovery of onium hydroxide from compositions containing process residues In force · From the USPTO record | In force | From the USPTO record | |
| US 9,944,853 | Color inhibitor for quaternary ammonium hydroxide in non-aqueous solvent In force · From the USPTO record | In force | From the USPTO record | |
| US 10,297,465 | Selective Metal/Metal Oxide Etch Process In force · High confidence | In force | High confidence |
Also on record, not counted in the 17: 11 lapsed for an unpaid fee · 36 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.
2 pending · 1 abandoned · 6 no status recorded