Em Coretech Inc.

8 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.

Ending by 2030

Jun 2039

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 Aug 13, 2027
The maintenance fee for Device for Compensating for Voltage or Current (US 11,901,832) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
1 fee due Oct 2, 2027
The maintenance fee for Divided Active Electromagnetic Interference Filter Module and Manufacturing Method Thereof (US 11,949,393) comes due Oct 2, 2027. Unpaid by Apr 3, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

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 8 of 8

Patent	Title	Status	Expires	Confidence
US 12,695,442	Isolated Type Active EMI Filter Having No Additional Elements on Power Line In force Term ends Jun 2, 2039 · High confidence	In force	Term ends Jun 2, 2039	High confidence
US 12,470,189	Divided Active Electromagnetic Interference Filter Module and Manufacturing Method Thereof In force Term ends Mar 27, 2040 · High confidence	In force	Term ends Mar 27, 2040	High confidence
US 12,170,489	Device for Compensating for Current or Voltage In force Term ends Apr 17, 2040 · High confidence	In force	Term ends Apr 17, 2040	High confidence
US 11,949,393	Divided Active Electromagnetic Interference Filter Module and Manufacturing Method Thereof In force Term ends Oct 16, 2040 · High confidence	In force	Term ends Oct 16, 2040	High confidence
US 11,901,832	Device for Compensating for Voltage or Current In force Term ends Nov 5, 2040 · High confidence	In force	Term ends Nov 5, 2040	High confidence
US 12,095,433	Isolated Type Active EMI Filter Having No Additional Elements on Power Line In force Term ends Jun 2, 2041 · High confidence	In force	Term ends Jun 2, 2041	High confidence
US 12,159,742	Active Current Compensation Device Capable of Detecting Malfunction In force Term ends Jun 11, 2041 · High confidence	In force	Term ends Jun 11, 2041	High confidence
US 12,456,920	Active Compensation Device Providing Electromagnetic Wave Noise Data In force Term ends Aug 9, 2042 · High confidence	In force	Term ends Aug 9, 2042	High confidence

Also on record, not counted in the 8: 2 patents in force now held by others. 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.

5 pending · 1 abandoned

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