Doobon Inc.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
3
Ending by 2030
May 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 Feb 20, 2027The maintenance fee for Hydrotalcite for P.V.C. stabilizer and a method of thereof (US 10,385,190) comes due Feb 20, 2027. Unpaid by Aug 20, 2027, it lapses early.
- 1 fee due Jun 29, 2027The maintenance fee for Flame-retardant polyolefin resin containing piperazine-based metal salt blend (US 9,221,961) comes due Jun 29, 2027. Unpaid by Dec 29, 2027, it lapses early.
- 1 fee due Oct 19, 2027The maintenance fee for Additive composition including counteragent (US 9,315,649) comes due Oct 19, 2027. Unpaid by Apr 19, 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 5 of 5
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,945,689 | Hydrotalcite for P.V.C. stabilizer and a method of thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 8,318,129 | Hydrotalcite imparting improved thermoresistance to resins and preparation method thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 10,385,190 | Hydrotalcite for P.V.C. stabilizer and a method of thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 9,221,961 | Flame-retardant polyolefin resin containing piperazine-based metal salt blend In force · From the USPTO record | In force | From the USPTO record | |
| US 9,315,649 | Additive composition including counteragent In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 5: 1 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 no status recorded