Houghton Technical Corp.
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.
4
Ending by 2030
Oct 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.
- 2 fees due Dec 4, 2026
- 1 fee due Jul 7, 2027The maintenance fee for Materials that provide bioresistance and/or defoaming and slower cooling properties for aqueous quenchants (US 10,526,447) comes due Jul 7, 2027. Unpaid by Jan 7, 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 8,764,914 | Aqueous quenching media and use thereof in quenching metal substrates In force · From the USPTO record | In force | From the USPTO record | |
| US 8,252,195 | Methods and Compositions for Acid Treatment of a Metal Surface In force · Medium confidence | In force | Medium confidence | |
| US 9,803,255 | Aqueous quenching media and use thereof in quenching metal substrates In force · From the USPTO record | In force | From the USPTO record | |
| US 8,460,553 | Recovery by vapor recompression of industrial process fluid components In force · From the USPTO record | In force | From the USPTO record | |
| US 9,475,116 | Methods for die casting metals using phase separable fluids In force · From the USPTO record | In force | From the USPTO record | |
| US 9,969,625 | Component recovery from metal quenching bath or spray In force · From the USPTO record | In force | From the USPTO record | |
| US 10,308,892 | Compositions and use thereof for metal shaping In force · From the USPTO record | In force | From the USPTO record | |
| US 10,308,891 | Hydraulic fluid compositions In force · From the USPTO record | In force | From the USPTO record | |
| US 10,526,447 | Materials that provide bioresistance and/or defoaming and slower cooling properties for aqueous quenchants In force · From the USPTO record | In force | From the USPTO record | |
| US 11,535,818 | Method and Compositions for Cleaning Aluminum Cans 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.
1 abandoned · 5 no status recorded