O2Micro, Inc.

35 patents currently held · Updated Nov 14, 2026

205 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.

Ending by 2030

Mar 2027

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 Dec 30, 2026
The maintenance fee for System and Methods for Protection of Batter Modules (US 9,071,049) comes due Dec 30, 2026. Unpaid by Jun 30, 2027, it lapses early.
1 fee due Jan 11, 2027
The maintenance fee for Controller and Battery Management Methods (US 11,699,915) comes due Jan 11, 2027. Unpaid by Jul 12, 2027, it lapses early.
2 fees due Mar 8 to 26, 2027 · next Mar 8
1 fee due Apr 3, 2027
The maintenance fee for Battery Management Systems and Methods, and Open Cell Detection Systems (US 11,777,154) comes due Apr 3, 2027. Unpaid by Oct 4, 2027, it lapses early.
1 fee due Jul 14, 2027
The maintenance fee for Devices with Battery Remaining Capacity Estimating Functions (US 10,534,037) comes due Jul 14, 2027. Unpaid by Jan 14, 2028, it lapses early.
1 fee due Sep 12, 2027
The maintenance fee for Open Cell Detection Method and Open Cell Recovery Detection Method in a Battery Management System (US 11,927,642) comes due Sep 12, 2027. Unpaid by Mar 13, 2028, it lapses early.
1 fee due Oct 9, 2027
The maintenance fee for Managing power in a portable device comprising multiple batteries (US 11,955,821) comes due Oct 9, 2027. Unpaid by Apr 10, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted since Aug 16, 2026
4 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 8,330,608	Systems and Methods for Battery Status Indication In force Ends no later than Mar 1, 2027 · Low confidence	In force	Ends no later than Mar 1, 2027	Low confidence
US 8,237,379	Circuits and Methods for Powering Light Sources In force Term ends Aug 5, 2028 · High confidence	In force	Term ends Aug 5, 2028	High confidence
US 8,378,589	Driving circuit with dimming controller for driving light sources In force Term ends Dec 12, 2028 · From the USPTO record	In force	Term ends Dec 12, 2028	From the USPTO record
US 8,482,219	Driving circuit with dimming controller for driving light sources In force Term ends Dec 12, 2028 · From the USPTO record	In force	Term ends Dec 12, 2028	From the USPTO record
US 9,018,917	Power Management Systems with Charge Pumps In force Term ends Jan 5, 2029 · Medium confidence	In force	Term ends Jan 5, 2029	Medium confidence
US 8,519,676	Circuits and Methos for Battery Charging In force Term ends Apr 26, 2029 · Medium confidence	In force	Term ends Apr 26, 2029	Medium confidence
US 8,570,013	A Power Regulator for Converting an Input Voltage to an Output Voltage In force Term ends May 26, 2029 · High confidence	In force	Term ends May 26, 2029	High confidence
US 9,130,378	Systems and Methods for Balancing Battery Cells In force Ends no later than Nov 5, 2029 · Low confidence	In force	Ends no later than Nov 5, 2029	Low confidence
US 8,598,844	Systems and Methods for Balancing Battery Cells In force Ends no later than Feb 9, 2030 · Low confidence	In force	Ends no later than Feb 9, 2030	Low confidence
US 9,071,049	System and Methods for Protection of Batter Modules In force Term ends Aug 23, 2030 · High confidence	In force	Term ends Aug 23, 2030	High confidence

10 of 35 patents shown.

Pro members see all 35.

Pro members: see all 35 patents

Also on record, not counted in the 35: 205 patents in force now held by others · 174 lapsed for an unpaid fee · 47 ended at full term · 1 surrendered on reissue. 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.

Export every term end as CSV · Pro

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.

3 pending · 24 abandoned · 81 no status recorded

List them