Merichem Technologies, LLC
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.
7
Ending by 2030
Jun 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 2, 2027The maintenance fee for Oxidation Process (US 10,336,949) comes due Jan 2, 2027. Unpaid by Jul 2, 2027, it lapses early.
- 1 fee due Apr 29, 2027The maintenance fee for Liquid-Liquid Mass Transfer Process and Apparatus (US 10,456,711) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
- 2 fees due May 28, 2027
- 1 fee due Jun 30, 2027The maintenance fee for Contactor and separation apparatus and process of using same (US 10,518,194) comes due Jun 30, 2027. Unpaid by Jan 3, 2028, it lapses early.
- 1 fee due Aug 25, 2027The maintenance fee for Method for treating sulfides in waste streams (US 10,570,038) comes due Aug 25, 2027. Unpaid by Feb 25, 2028, it lapses early.
- 1 fee due Oct 28, 2027The maintenance fee for Contactor and separation apparatus and process of using same (US 10,633,599) comes due Oct 28, 2027. Unpaid by Apr 28, 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 8,454,824 | Single vertical tower for treating a stream of rich caustic containing mercaptan compounds In force · From the USPTO record | In force | From the USPTO record | |
| US 7,744,841 | Sulfur Removal Using Ferrous Carbonate Absorbent In force · High confidence | In force | High confidence | |
| US 7,833,499 | Separation process In force · From the USPTO record | In force | From the USPTO record | |
| US 9,458,392 | Hydrocarbon treatment process In force · From the USPTO record | In force | From the USPTO record | |
| US 8,597,375 | Three phase sulfur separation method with interface control In force · From the USPTO record | In force | From the USPTO record | |
| US 7,951,353 | Flow control method and apparatus for a continuous multiple zone mass transfer In force · From the USPTO record | In force | From the USPTO record | |
| US 8,652,435 | High Pressure Reduction-Oxidation Desulfurization Process In force · Medium confidence | In force | Medium confidence | |
| US 8,367,009 | Three phase sulfur separation system with interface control In force · From the USPTO record | In force | From the USPTO record | |
| US 8,372,365 | High pressure reduction-oxidation desulfurization process In force · From the USPTO record | In force | From the USPTO record | |
| US 8,900,446 | Hydrocarbon treatment process In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 34: 1 patent in force now held by others · 4 lapsed for an unpaid fee · 5 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.