Degremont
2 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 3 name spellings.
2
Ending by 2030
Dec 2028
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 Apr 29, 2027The maintenance fee for Methods and systems for flue gas denitrification (US 10,458,650) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
- 1 fee due Sep 29, 2027The maintenance fee for Method for washing a filter having at least two layers of filtering media, in particular for filtering seawater, and equipment for implementing said method (US 9,295,929) comes due Sep 29, 2027. Unpaid by Mar 29, 2028, it lapses early.
Recent changes
- 1 term has ended since Aug 16, 2026
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 8,298,422 | Method and plant for the treatment of effluents containing nitrogen in a sequencing batch reactor In force · From the USPTO record | In force | From the USPTO record | |
| US 9,360,848 | Reverse-osmosis water desalination plant In force · From the USPTO record | In force | From the USPTO record | |
| US 9,011,677 | Quick Static Decanter for Prethickening Water Treatment Sludge, and Plant Including Such a Decanter In force · High confidence | In force | High confidence | |
| US 8,628,662 | Filtering device comprising membrane filtering modules and assembly of modules for such a device In force · From the USPTO record | In force | From the USPTO record | |
| US 8,832,962 | Method and facility for drying slurry-like materials, in particular sludge from wastewater treatment plants In force · From the USPTO record | In force | From the USPTO record | |
| US 9,295,929 | Method for washing a filter having at least two layers of filtering media, in particular for filtering seawater, and equipment for implementing said method In force · From the USPTO record | In force | From the USPTO record | |
| US 9,850,155 | Method for treating organic waste, in particular sludge from wastewater treatment plants, and facility for implementing said method In force · From the USPTO record | In force | From the USPTO record | |
| US 9,764,976 | Process for reducing the production of sludge by municipal or industrial wastewater purification plants, and equipment for the implementation thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 9,751,780 | Coagulation/flocculation apparatus for the treatment of a hydraulic flow, and implementation process In force · From the USPTO record | In force | From the USPTO record | |
| US 10,065,878 | Method and facility for the forced dewatering of a sludge of saline residues In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 15: 2 patents in force now held by others · 30 lapsed for an unpaid fee · 81 ended at full term · 1 surrendered on reissue. 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 · 12 no status recorded