Defond Electech Co., Ltd.
7 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.
Previously recorded as Dongguan Chen da Appliance Co. Ltd. (to 2018)
0
Ending by 2030
Dec 2032
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 Variable-Speed Control Assembly for an Electric Device (US 11,664,710) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
- 1 fee due Jan 4, 2027The maintenance fee for Lock-Off Mechanism for Locking-Off a Trigger Assembly of an Electric Device (US 11,694,862) comes due Jan 4, 2027. Unpaid by Jul 6, 2027, it lapses early.
- 1 fee due May 21, 2027The maintenance fee for Contact Lever Assembly for Use with an Electrical Switch (US 11,823,856) comes due May 21, 2027. Unpaid by Nov 22, 2027, it lapses early.
- 2 fees due Jul 7 to 28, 2027 · next Jul 7
- 2 fees due Aug 20 to 27, 2027 · next Aug 20
- 2 fees due Sep 5 to 17, 2027 · next Sep 5
- 1 fee due Nov 7, 2027The maintenance fee for Control Assembly for Use with an Electric Power Tool (US 11,975,434) comes due Nov 7, 2027. Unpaid by May 8, 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 8,859,915 | Electrical Switch In force · High confidence | In force | High confidence | |
| US 10,283,291 | Waterproof Toggle Switch In force · High confidence | In force | High confidence | |
| US 10,083,804 | Speed Control Switch In force · High confidence | In force | High confidence | |
| US 10,147,567 | Push-Button Switch Capable of Adjusting Output Power In force · High confidence | In force | High confidence | |
| US 10,529,502 | Lockable Trigger Mechanism for Use in an Electrical Device In force · High confidence | In force | High confidence | |
| US D965,536 | Touch LED Component In force · High confidence | In force | High confidence | |
| US 10,547,257 | Variable-Speed Controller for Use with an Electric Device In force · High confidence | In force | High confidence | |
| US 11,099,665 | Control Knob for Controlling Operation of a Machine In force · High confidence | In force | High confidence | |
| US 11,907,449 | Control Knob with Motion Sensing for Controlling Operation of a Machine In force · High confidence | In force | High confidence | |
| US 10,848,084 | Brushless DC Motor Control Unit In force · High confidence | In force | High confidence |
Also on record, not counted in the 34: 7 patents in force now held by others · 2 lapsed for an unpaid fee · 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.
4 pending · 10 abandoned · 1 no status recorded