Fuel Tech, Inc.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
1
Ending by 2030
Jul 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 Oct 2, 2027The maintenance fee for Removing contaminants from water with adsorbents (US 11,944,952) comes due Oct 2, 2027. Unpaid by Apr 3, 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 8,852,542 | Selective catalytic NOx reduction process and apparatus providing improved gassification of urea to form ammonia-containing gas In force · From the USPTO record | In force | From the USPTO record | |
| US 8,141,588 | Flow control method and apparatus In force · From the USPTO record | In force | From the USPTO record | |
| US 8,951,492 | Ammonia Gas Generation from Urea for Low Temperature Process Requirements In force · Medium confidence | In force | Medium confidence | |
| US 8,470,277 | Selective catalytic NOx reduction process and control system In force · From the USPTO record | In force | From the USPTO record | |
| US 9,586,831 | Urea to ammonia process In force · From the USPTO record | In force | From the USPTO record | |
| US 9,656,207 | Selective catalytic NOx reduction apparatus providing improved gasification of urea In force · From the USPTO record | In force | From the USPTO record | |
| US 10,124,288 | Controlling injection of magnesium oxide for controlling SO3 with enhanced boiler efficiency In force · From the USPTO record | In force | From the USPTO record | |
| US 11,339,056 | Controlled, compact, on-demand ammonia gas generation process and apparatus In force · From the USPTO record | In force | From the USPTO record | |
| US 11,542,451 | Water in Fuel Nanoemulsion and Method of Making the Same In force · High confidence | In force | High confidence | |
| US 11,642,634 | Gas Saturation of Liquids with Application to Dissolved Gas Flotation and Supplying Dissolved Gases to Downstream Processes and Water Treatment In force · Medium confidence | In force | Medium confidence |
Also on record, not counted in the 11: 21 lapsed for an unpaid fee · 51 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.
10 no status recorded