Tecogen, Inc.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
5
Ending by 2030
Jun 2030
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 Mar 1, 2027The maintenance fee for Assembly and Method for Reducing Nitrogen Oxides, Carbon Monoxide and Hydrocarbons in Exhausts of Internal Combustion Engines (US 9,121,326) comes due Mar 1, 2027. Unpaid by Sep 1, 2027, it lapses early.
- 1 fee due Sep 19, 2027The maintenance fee for Hybrid power system with electric generator and auxiliary power source (US 11,936,327) comes due Sep 19, 2027. Unpaid by Mar 20, 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.
Showing 1 to 10 of 10
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,470,126 | Assembly and method for reducing ammonia in exhaust of internal combustion engines In force · From the USPTO record | In force | From the USPTO record | |
| US 9,121,326 | Assembly and Method for Reducing Nitrogen Oxides, Carbon Monoxide and Hydrocarbons in Exhausts of Internal Combustion Engines In force · High confidence | In force | High confidence | |
| US 8,578,704 | Assembly and Method for Reducing Nitrogen Oxides, Carbon Monoxide and Hydrocarbons in Exhausts of Internal Combustion Engines In force · High confidence | In force | High confidence | |
| US 9,856,767 | Systems and methods for reducing emissions in exhaust of vehicles and producing electricity In force · From the USPTO record | In force | From the USPTO record | |
| US 9,631,534 | Assembly and method for reducing nitrogen oxides, carbon monoxide, hydrocarbons and hydrogen gas in exhausts of internal combustion engines and producing an electrical output In force · From the USPTO record | In force | From the USPTO record | |
| US 9,956,526 | Poison-resistant catalyst and systems containing same In force · From the USPTO record | In force | From the USPTO record | |
| US 9,995,195 | Emissions control systems and methods for vehicles In force · From the USPTO record | In force | From the USPTO record | |
| US 10,774,724 | Dual stage internal combustion engine aftertreatment system using exhaust gas intercooling and charger driven air ejector In force · From the USPTO record | In force | From the USPTO record | |
| US 10,774,720 | NOx reduction without urea using a dual stage catalyst system with intercooling in vehicle gasoline engines In force · From the USPTO record | In force | From the USPTO record | |
| US 11,936,327 | Hybrid power system with electric generator and auxiliary power source In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 10: 1 lapsed for an unpaid fee · 14 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.
3 no status recorded