SLT Technologies, Inc.

69 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

Nov 2026

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 Nov 21 to 28, 2026 · next Nov 21
1 fee due Jan 18, 2027
The maintenance fee for Improved Group III Nitride Substrate, Method of Making, and Method of Use (US 11,705,322) comes due Jan 18, 2027. Unpaid by Jul 19, 2027, it lapses early.
2 fees due Feb 8 to 11, 2027 · next Feb 8
1 fee due Mar 3, 2027
The maintenance fee for Method for growth of a merged crystal by bonding at least a first and second crystal to an adhesion layer to form a tiled substrate and growing a crystalline composition over said tiled substrate (US 10,400,352) comes due Mar 3, 2027. Unpaid by Sep 3, 2027, it lapses early.
1 fee due Apr 13, 2027
The maintenance fee for High Pressure Apparatus and Method for Nitride Crystal Growth (US 9,157,167) comes due Apr 13, 2027. Unpaid by Oct 13, 2027, it lapses early.
1 fee due May 3, 2027
The maintenance fee for Method for Synthesis of High Quality Large Area Bulk Gallium Based Crystals (US 9,175,418) comes due May 3, 2027. Unpaid by Nov 3, 2027, it lapses early.
1 fee due Aug 13, 2027
The maintenance fee for Oxygen-Doped Group III Metal Nitride and Method of Manufacture (US 11,898,269) comes due Aug 13, 2027. Unpaid by Feb 14, 2028, it lapses early.
3 fees due Sep 1 to 30, 2027 · next Sep 1
1 fee due Oct 14, 2027
The maintenance fee for Method and System for Preparing Polycrystalline Group III Metal Nitride (US 10,619,239) comes due Oct 14, 2027. Unpaid by Apr 14, 2028, it lapses early.
1 fee due Nov 12, 2027
The maintenance fee for Oxygen-Doped Group III Metal Nitride and Method of Manufacture (US 10,648,102) comes due Nov 12, 2027. Unpaid by May 12, 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
3 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 7,704,324	Apparatus for Processing Materials in Supercritical Fluids and Methods Thereof In force Term ends Nov 15, 2026 · High confidence	In force	Term ends Nov 15, 2026	High confidence
US 7,705,276	Heater, Apparatus, and Associated Method In force Term ends Aug 22, 2027 · High confidence	In force	Term ends Aug 22, 2027	High confidence
US 8,039,412	Crystalline Composition, Device, and Associated Method In force Term ends Mar 31, 2028 · High confidence	In force	Term ends Mar 31, 2028	High confidence
US 7,942,970	Apparatus for Making Crystalline Composition In force Term ends Jul 15, 2028 · High confidence	In force	Term ends Jul 15, 2028	High confidence
US 7,642,122	Method for Forming Nitride Crystals In force Term ends Jul 21, 2028 · High confidence	In force	Term ends Jul 21, 2028	High confidence
US 9,831,386	Surface Morphology of Non-Polar Gallium Nitride Containing Substrates In force Term ends Jul 2, 2029 · High confidence	In force	Term ends Jul 2, 2029	High confidence
US 8,956,894	White Light Devices Using Non-Polar or Semipolar Gallium Containing Materials and Phosphors In force Term ends Aug 3, 2029 · High confidence	In force	Term ends Aug 3, 2029	High confidence
US 8,979,999	Process for Large-Scale Ammonothermal Manufacturing of Gallium Nitride Boules In force Term ends Aug 3, 2029 · High confidence	In force	Term ends Aug 3, 2029	High confidence
US 8,021,481	Process and Apparatus for Large-Scale Manufacturing of Bulk Monocrystalline Gallium-Containing Nitride In force Term ends Aug 4, 2029 · High confidence	In force	Term ends Aug 4, 2029	High confidence
US 8,444,765	Process and Apparatus for Large-Scale Manufacturing of Bulk Monocrystalline Gallium-Containing Nitride In force Term ends Aug 4, 2029 · High confidence	In force	Term ends Aug 4, 2029	High confidence

10 of 69 patents shown.

Pro members see all 69.

Pro members: see all 69 patents

Also on record, not counted in the 69: 29 lapsed for an unpaid fee · 21 ended at full term · 1 past the fee grace period · 4 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.

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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.

4 pending · 8 abandoned · 1 no status recorded

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