S-Tech Co., Ltd.

13 patents currently held · Updated Nov 14, 2026

1 more in force is now held by another company

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

Ending by 2030

Aug 2032

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 Feb 11, 2027
The maintenance fee for Method of Fabricating Silicon Carbide (US 9,102,543) comes due Feb 11, 2027. Unpaid by Aug 11, 2027, it lapses early.
1 fee due Aug 9, 2027
The maintenance fee for Reaction Container and Vacuum Heat Treatment Apparatus Having the Same (US 9,254,589) comes due Aug 9, 2027. Unpaid by Feb 9, 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.

Patent	Title	Status	Expires	Confidence
US 9,102,543	Method of Fabricating Silicon Carbide In force Term ends Aug 1, 2032 · High confidence	In force	Term ends Aug 1, 2032	High confidence
US 9,254,589	Reaction Container and Vacuum Heat Treatment Apparatus Having the Same In force Term ends Aug 17, 2032 · High confidence	In force	Term ends Aug 17, 2032	High confidence
US 9,409,782	Method of Fabricating Silicon Carbide Powder In force Term ends Nov 11, 2032 · High confidence	In force	Term ends Nov 11, 2032	High confidence
US 9,416,012	Method of Fabricating Silicon Carbide Powder In force Term ends Dec 17, 2032 · High confidence	In force	Term ends Dec 17, 2032	High confidence
US 9,534,316	Silicon Carbide Powder and Method for Manufacturing the Same In force Term ends Jan 18, 2033 · High confidence	In force	Term ends Jan 18, 2033	High confidence
US 9,846,084	Vacuum Heat Treatment Apparatus In force Term ends Mar 18, 2033 · High confidence	In force	Term ends Mar 18, 2033	High confidence
US 9,399,583	Silicon Carbide Powder Production Method In force Term ends Apr 23, 2033 · High confidence	In force	Term ends Apr 23, 2033	High confidence
US 9,920,450	Silicon Carbide Powder, Method for Manufacturing the Same and Method for Growing Single Crystal In force Term ends May 23, 2033 · High confidence	In force	Term ends May 23, 2033	High confidence
US 9,551,086	METHOD OF PREPARING SILICON CARBIDE POWDER COMPRISING CONVERTING A LIQUID SiC PRECURSOR TO A B-PHASE SiC PARTICULATE MATERIAL In force Term ends May 28, 2033 · High confidence	In force	Term ends May 28, 2033	High confidence
US 9,834,857	Ingot Raw Material Supply System In force Term ends Jul 7, 2033 · High confidence	In force	Term ends Jul 7, 2033	High confidence

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents

Also on record, not counted in the 13: 1 patent 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

Every application published under this name has become a patent.