KELK Ltd.
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.
3
Ending by 2030
May 2029
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 Nov 30, 2026The maintenance fee for Method for manufacturing thermoelectric conversion element and thermoelectric conversion element (US 11,665,964) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
- 3 fees due Dec 6 to 25, 2026 · next Dec 6
- 1 fee due Jan 16, 2027The maintenance fee for Thermoelectric generation unit (US 10,355,189) comes due Jan 16, 2027. Unpaid by Jul 16, 2027, it lapses early.
- 3 fees due Mar 10 to 19, 2027 · next Mar 10
- 2 fees due Apr 24 to 27, 2027 · next Apr 24
- 1 fee due May 7, 2027The maintenance fee for Electrode connection structure and detection device (US 11,811,179) comes due May 7, 2027. Unpaid by Nov 8, 2027, it lapses early.
- 1 fee due Jul 9, 2027The maintenance fee for Temperature regulation device and temperature regulation method (US 11,867,433) comes due Jul 9, 2027. Unpaid by Jan 10, 2028, it lapses early.
- 3 fees due Aug 11 to 20, 2027 · next Aug 11
- 3 fees due Sep 5 to 19, 2027 · next Sep 5
- 4 fees due Oct 9 to 21, 2027 · next Oct 9
- 1 fee due Nov 7, 2027The maintenance fee for Temperature adjustment device with spacers (US 11,978,621) comes due Nov 7, 2027. Unpaid by May 8, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
- 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 8,109,328 | Fluid temperature control device In force · From the USPTO record | In force | From the USPTO record | |
| US 7,938,577 | Fluid temperature control device In force · From the USPTO record | In force | From the USPTO record | |
| US 8,490,684 | Device and method for adjusting temperature of fluid In force · From the USPTO record | In force | From the USPTO record | |
| US 9,490,412 | Peltier module for laser diode In force · From the USPTO record | In force | From the USPTO record | |
| US 9,852,888 | Circulating cooling/heating device In force · From the USPTO record | In force | From the USPTO record | |
| US 9,170,036 | Thermoelectric module In force · From the USPTO record | In force | From the USPTO record | |
| US 9,917,238 | Thermoelectric element and thermoelectric module provided with same In force · From the USPTO record | In force | From the USPTO record | |
| US 10,147,859 | Thermoelectric power module In force · From the USPTO record | In force | From the USPTO record | |
| US 10,224,472 | Thermoelectric power module In force · From the USPTO record | In force | From the USPTO record | |
| US 10,193,046 | Thermoelectric generating device and thermoelectric generating method In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 62: 1 patent in force now held by others · 12 lapsed for an unpaid fee. 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.
4 pending · 4 abandoned · 24 no status recorded