Wavefront Holdings, LLC

9 patents currently held · Updated Nov 15, 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

Aug 2029

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 Apr 22, 2027
The maintenance fee for Conductive isolation between phototransistors (US 10,453,984) comes due Apr 22, 2027. Unpaid by Oct 22, 2027, it lapses early.
1 fee due Aug 23, 2027
The maintenance fee for Phototransistor capable of detecting photon flux below photon shot noise (US 9,269,846) comes due Aug 23, 2027. Unpaid by Feb 23, 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 17, 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 9 of 9

Patent	Title	Status	Expires	Confidence
US 8,314,446	Photo-detector array, semiconductor image intensifier and methods of making and using the same In force Term ends Aug 21, 2029 · From the USPTO record	In force	Term ends Aug 21, 2029	From the USPTO record
US 8,354,324	Mesa heterojunction phototransistor and method for making same In force Term ends Jan 14, 2030 · From the USPTO record	In force	Term ends Jan 14, 2030	From the USPTO record
US 8,253,215	Mesa heterojunction phototransistor and method for making same In force Term ends Aug 1, 2030 · From the USPTO record	In force	Term ends Aug 1, 2030	From the USPTO record
US 9,269,846	Phototransistor capable of detecting photon flux below photon shot noise In force Term ends Sep 20, 2034 · From the USPTO record	In force	Term ends Sep 20, 2034	From the USPTO record
US 11,217,719	Conductive isolation between phototransistors In force Ends no later than Mar 23, 2037 · From the USPTO record	In force	Ends no later than Mar 23, 2037	From the USPTO record
US 10,453,984	Conductive isolation between phototransistors In force Term ends Apr 21, 2037 · From the USPTO record	In force	Term ends Apr 21, 2037	From the USPTO record
US 10,121,819	Phototransistor having E-B junction and B-C junction are in direct physical contact and completely encapsulated only by the emitter, the collector and a dielectric In force Term ends May 29, 2037 · From the USPTO record	In force	Term ends May 29, 2037	From the USPTO record
US 10,002,979	Unipolar doping in photodiode and phototransistor In force Term ends May 30, 2037 · From the USPTO record	In force	Term ends May 30, 2037	From the USPTO record
US 12,777,707	High-Bandgap(EG) Structure in Planar Floating-Base Bipolar Phototransistor (PT) In force Term ends Apr 5, 2045 · High confidence	In force	Term ends Apr 5, 2045	High confidence

Also on record, not counted in the 9: 2 patents in force now held by others · 2 lapsed for an unpaid fee · 1 ended at full term. 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.

1 pending

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