Skaichips Co., Ltd.

61 patents currently held · Updated Nov 14, 2026

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 2 name spellings.

Ending by 2030

Jan 2028

Next term end

When these terms end

5 yrs10 yrs20 yrs

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 19, 2026
The maintenance fee for Switching Mode Power Supply and Control Method Thereof (US 9,036,374) comes due Nov 19, 2026. Unpaid by May 19, 2027, it lapses early.
3 fees due Dec 9 to 23, 2026 · next Dec 9
1 fee due Jan 14, 2027
The maintenance fee for PWM Control Circuit, Flyback Converter and Method for Controlling PWM (US 9,083,248) comes due Jan 14, 2027. Unpaid by Jul 14, 2027, it lapses early.
1 fee due Feb 18, 2027
The maintenance fee for Power Supply Device (US 9,112,353) comes due Feb 18, 2027. Unpaid by Aug 18, 2027, it lapses early.
1 fee due Mar 29, 2027
The maintenance fee for Light Emitting Diode Driver (US 9,148,928) comes due Mar 29, 2027. Unpaid by Sep 29, 2027, it lapses early.
1 fee due Apr 27, 2027
The maintenance fee for Light Emitting Diode Driving Apparatus and Light Emitting Diode Lighting Apparatus (US 9,173,265) comes due Apr 27, 2027. Unpaid by Oct 27, 2027, it lapses early.
2 fees due Jun 1 to 29, 2027 · next Jun 1
1 fee due Jul 5, 2027
The maintenance fee for Voltage Control Circuit for Dimmer and Dimming Method Using the Same (US 9,232,580) comes due Jul 5, 2027. Unpaid by Jan 5, 2028, it lapses early.
3 fees due Aug 2 to 23, 2027 · next Aug 2
1 fee due Sep 15, 2027
The maintenance fee for Average Current Controller, Average Current Control Method and Buck Converter Using the Average Current Controller (US 9,287,777) comes due Sep 15, 2027. Unpaid by Mar 15, 2028, it lapses early.
1 fee due Oct 9, 2027
The maintenance fee for Dc-Dc Converter with Intelligent Controller (US 11,955,888) comes due Oct 9, 2027. Unpaid by Apr 10, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

2 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 7,612,505	Liquid Crystal Display Backlight Inverter In force Term ends Jan 2, 2028 · High confidence	In force	Term ends Jan 2, 2028	High confidence
US 7,646,181	Control Circuit of Dc-Dc Converter In force Term ends Apr 1, 2028 · High confidence	In force	Term ends Apr 1, 2028	High confidence
US 7,741,893	Dual Mode Clock Generator In force Term ends Jun 14, 2028 · High confidence	In force	Term ends Jun 14, 2028	High confidence
US 7,902,932	Variable-Frequency Oscillator In force Term ends Nov 27, 2028 · High confidence	In force	Term ends Nov 27, 2028	High confidence
US 7,737,938	Driving Circuit for LCD Backlight In force Term ends Feb 15, 2029 · High confidence	In force	Term ends Feb 15, 2029	High confidence
US 7,839,376	Time Control Circuit for Backlight Inverter In force Term ends Feb 27, 2029 · High confidence	In force	Term ends Feb 27, 2029	High confidence
US 7,940,014	Apparatus for Driving Light Emitting Element In force Term ends Nov 27, 2029 · High confidence	In force	Term ends Nov 27, 2029	High confidence
US 8,018,177	Dimming Buck Type LED Driving Apparatus In force Term ends Mar 21, 2030 · High confidence	In force	Term ends Mar 21, 2030	High confidence
US 8,022,638	LCD Backlight Inverter In force Term ends Mar 27, 2030 · High confidence	In force	Term ends Mar 27, 2030	High confidence
US 8,115,413	Module for Controlling Light Emitting Diode Current for Selective Feedback, Apparatus and Method for Driving Light Emitting Diodes Using the Same In force Term ends Aug 11, 2030 · High confidence	In force	Term ends Aug 11, 2030	High confidence

10 of 61 patents shown.

Pro members see all 61.

Pro members: see all 61 patents

Also on record, not counted in the 61: 2 patents in force now held by others · 19 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.

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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 · 6 abandoned

List them