10 patents currently held

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

The next term ends in Oct 2034. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Oct 2034

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036 2037 20382039204020412042204320442045

notable patents all others Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

Notable: the highest-ranked patents in this portfolio by citations and family size.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Remaining-Life and Time-to-Failure Predictions of Power Assets US 11,243,263

The most cited patent in this portfolio, cited by 11 later US patents, top 10% of utility patents granted in 2022 in our data. Protection runs to 2037.

Ends Aug 2037 · High confidence Also notable

Test Switch Signal Analyzer US 9,638,755

The largest patent family in this portfolio, 5 related applications, renewed at every maintenance window due so far. Protection runs to 2034.

Ends Oct 2034 · High confidence Also notable

Using Steady-State Changes to Discern the Operating Performance of an Individual Machine Operating on a Commonly Supplied Electrical Network Connected to Multiple Machines US 10,678,668

Granted 2020. Computed term ends 2038.

Ends Oct 2038 · High confidence

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 Apr 29, 2027
The maintenance fee for Test Switch Signal Analyzer (US 10,459,032) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
1 fee due Jul 9, 2027
The maintenance fee for Remaining-Life and Time-To-Failure Predictions of Power Assets (US 11,867,770) comes due Jul 9, 2027. Unpaid by Jan 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

What they patent

Grouped by real patent family, largest first, labeled by the earliest filing in each. No technology classification is inferred from titles.

Remaining-Life and Time-to-Failure Predictions of Power Assets	3 in force	to Aug 2037
Test Switch Signal Analyzer	3 in force	to Oct 2034
Using Steady-State Changes to Discern the Operating Performance of an Individual Machine Operating on a Commonly Supplied Electrical Network Connected to Multiple Machines	2 in force	to Oct 2038
Method and System for Performing Condition Monitoring of Wind Turbine Components	1 in force	to Feb 2041
Enhanced Mounting System for Panel Mount Test Switches and Test Blocks	1 in force	to Sep 2037

Patents held now

Soonest term end first.

Showing 1 to 10 of 10

Patent	Title	Status	Expires	Confidence
US 9,638,755	Test Switch Signal Analyzer In force Term ends Oct 16, 2034 · High confidence	In force	Term ends Oct 16, 2034	High confidence
US 10,459,032	Test Switch Signal Analyzer In force Term ends Oct 16, 2034 · High confidence	In force	Term ends Oct 16, 2034	High confidence
US 10,877,096	Test Switch Signal Analyzer In force Term ends Oct 16, 2034 · High confidence	In force	Term ends Oct 16, 2034	High confidence
US 11,867,770	Remaining-Life and Time-To-Failure Predictions of Power Assets In force Term ends Jun 2, 2036 · High confidence	In force	Term ends Jun 2, 2036	High confidence
US 12,405,316	Remaining-Life and Time-To-Failure Predictions of Power Assets In force Term ends Jun 2, 2036 · High confidence	In force	Term ends Jun 2, 2036	High confidence
US 11,243,263	Remaining-Life and Time-to-Failure Predictions of Power Assets In force Term ends Aug 2, 2037 · High confidence	In force	Term ends Aug 2, 2037	High confidence
US 10,816,573	Enhanced Mounting System for Panel Mount Test Switches and Test Blocks In force Term ends Sep 25, 2037 · High confidence	In force	Term ends Sep 25, 2037	High confidence
US 11,210,191	Using Steady-State Changes To Discern The Operating Performance Of An Individual Machine Operating On A Commonly Supplied Electrical Network Connected To Multiple Machines In force Term ends Jun 14, 2038 · High confidence	In force	Term ends Jun 14, 2038	High confidence
US 10,678,668	Using Steady-State Changes to Discern the Operating Performance of an Individual Machine Operating on a Commonly Supplied Electrical Network Connected to Multiple Machines In force Term ends Oct 5, 2038 · High confidence	In force	Term ends Oct 5, 2038	High confidence
US 12,723,570	Method and System for Performing Condition Monitoring of Wind Turbine Components In force Term ends Feb 18, 2041 · High confidence	In force	Term ends Feb 18, 2041	High confidence

Also on record, not counted in the 10: 2 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built

Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Fischer Block, Inc.