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10 patents currently held · Updated Nov 14, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Sep 2033

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.

2 fees due Apr 15, 2027

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted 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.

Showing 1 to 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,696,745	Apparatus for producing constant direct load current In force Term ends Sep 10, 2033 · From the USPTO record	In force	Term ends Sep 10, 2033	From the USPTO record
US 10,038,374	Apparatus for producing unvarying direct load current In force Term ends May 12, 2034 · From the USPTO record	In force	Term ends May 12, 2034	From the USPTO record
US 10,444,775	Apparatus for producing unvarying direct load current In force Term ends May 12, 2034 · From the USPTO record	In force	Term ends May 12, 2034	From the USPTO record
US 10,355,599	Method for generating high pulse voltage in an inductive load In force Term ends May 4, 2036 · From the USPTO record	In force	Term ends May 4, 2036	From the USPTO record
US 10,361,638	Apparatus for generating high pulse voltage In force Term ends May 4, 2036 · From the USPTO record	In force	Term ends May 4, 2036	From the USPTO record
US 10,447,167	Method of DC voltage - pulse voltage conversion In force Term ends Jan 10, 2037 · High confidence	In force	Term ends Jan 10, 2037	High confidence
US 10,840,893	Apparatus for generating high pulse voltage In force Term ends Apr 24, 2037 · From the USPTO record	In force	Term ends Apr 24, 2037	From the USPTO record
US 11,502,610	Apparatus for DC voltage—DC voltage conversion In force Term ends Sep 29, 2038 · From the USPTO record	In force	Term ends Sep 29, 2038	From the USPTO record
US 11,990,883	Electronically controllable resistor In force Term ends Jun 12, 2040 · From the USPTO record	In force	Term ends Jun 12, 2040	From the USPTO record
US 12,736,991	Controller for an electronically controlled resistor In force Term ends Aug 18, 2042 · High confidence	In force	Term ends Aug 18, 2042	High confidence

Also on record, not counted in the 10: 1 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

Every application published under this name has become a patent.