Stamicarbon B.V.
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.
Recorded under 6 name spellings.
13
Ending by 2030
Aug 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 11 to 23, 2026 · next Dec 11
- 2 fees due Jan 23 to 30, 2027 · next Jan 23
- 4 fees due Feb 6 to 20, 2027 · next Feb 6
- 5 fees due Mar 1 to 29, 2027 · next Mar 1
- 4 fees due Apr 3 to 29, 2027 · next Apr 3
- 1 fee due May 14, 2027The maintenance fee for Thermal stripping urea plant and process (US 11,814,340) comes due May 14, 2027. Unpaid by Nov 15, 2027, it lapses early.
- 1 fee due Jun 10, 2027The maintenance fee for Submicron particle removal from gas streams (US 10,500,535) comes due Jun 10, 2027. Unpaid by Dec 10, 2027, it lapses early.
- 2 fees due Jul 7 to 26, 2027 · next Jul 7
- 3 fees due Aug 11 to 27, 2027 · next Aug 11
- 2 fees due Oct 16 to 28, 2027 · next Oct 16
- 1 fee due Nov 5, 2027The maintenance fee for Removal of urea and ammonia from exhaust gases (US 10,640,428) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
- 3 terms have 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 7,704,419 | Process for the Preparation of Urea Granules In force · High confidence | In force | High confidence | |
| US 8,236,086 | Coated Fertilizer In force · High confidence | In force | High confidence | |
| US 8,283,494 | Process for the Preparation of Urea In force · High confidence | In force | High confidence | |
| US 8,158,824 | Process for the production of urea from ammonia and carbon dioxide In force · From the USPTO record | In force | From the USPTO record | |
| US 8,377,399 | Process for increasing the capacity of an existing urea plant In force · From the USPTO record | In force | From the USPTO record | |
| US 8,506,671 | Coated Fertilizer In force · High confidence | In force | High confidence | |
| US 8,622,325 | Process for producing granules In force · From the USPTO record | In force | From the USPTO record | |
| US 8,835,005 | Process for producing granules In force · From the USPTO record | In force | From the USPTO record | |
| US 9,464,009 | Removal of urea and ammonia from exhaust gases In force · From the USPTO record | In force | From the USPTO record | |
| US 9,556,077 | Removal of urea and ammonia from exhaust gases In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 118: 1 patent in force now held by others · 582 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.
2 pending · 1 abandoned · 8 no status recorded