13 patents currently held

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

The next term ends in Dec 2035. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Dec 2035

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028202920302031203220332034203520362037203820392040 2041 2042 204320442045

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

Ternary Digit Logic Circuit US 10,133,550

Granted 2018 and renewed at 2 of 3 maintenance windows. Protection runs to 2035.

Ends Dec 2035 · High confidence Also notable

Ternary Memory Cell for Logic-In-Memory and Memory Device Comprising Same US 11,727,988

Granted 2023. Computed term ends 2040.

Ends Nov 2040 · High confidence Also notable

Transistor, Method for Manufacturing Same, and Ternary Inverter Comprising Same US 12,520,539

Granted 2026. Too new for citation comparison; protection runs to 2042.

Ends Jul 2042 · 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 Feb 15, 2027
The maintenance fee for Ternary Memory Cell for Logic-In-Memory and Memory Device Comprising Same (US 11,727,988) comes due Feb 15, 2027. Unpaid by Aug 16, 2027, it lapses early.
1 fee due Aug 20, 2027
The maintenance fee for Transistor Element, Ternary Inverter Apparatus Comprising Same, and Method for Producing Same (US 11,908,863) comes due Aug 20, 2027. Unpaid by Feb 22, 2028, it lapses early.
1 fee due Sep 5, 2027
The maintenance fee for Ternary Logic Circuit (US 11,923,846) comes due Sep 5, 2027. Unpaid by Mar 6, 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.

What they patent

The 5 largest of its 13 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Transistor, Method for Manufacturing Same, and Ternary Inverter Comprising Same	1 in force	to Jul 2042
Transistor Device, Ternary Inverter Device Including Same, and Manufacturing Method Therefor	1 in force	to Jun 2042
Tunnel Field Effect Transistor and Ternary Inverter Comprising Same	1 in force	to Sep 2041
Transistor, Ternary Inverter Including Same, and Transistor Manufacturing Method	1 in force	to Jul 2041
Transistor Element, Ternary Inverter Apparatus Comprising Same, and Method for Producing Same	1 in force	to Jul 2041

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 10,133,550	Ternary Digit Logic Circuit In force Term ends Dec 29, 2035 · High confidence	In force	Term ends Dec 29, 2035	High confidence
US 11,908,863	Transistor Element, Ternary Inverter Apparatus Comprising Same, and Method for Producing Same In force Term ends Sep 9, 2040 · High confidence	In force	Term ends Sep 9, 2040	High confidence
US 11,727,988	Ternary Memory Cell for Logic-In-Memory and Memory Device Comprising Same In force Term ends Nov 26, 2040 · High confidence	In force	Term ends Nov 26, 2040	High confidence
US 12,165,699	Ternary Memory Cell and Memory Device Comprising Same In force Term ends Jan 7, 2041 · High confidence	In force	Term ends Jan 7, 2041	High confidence
US 12,154,950	Transistor, Ternary Inverter Comprising Same, and Transistor Manufacturing Method In force Term ends May 2, 2041 · High confidence	In force	Term ends May 2, 2041	High confidence
US 12,261,174	Transistor Element, Ternary Inverter Apparatus Comprising Same, and Method for Producing Same In force Term ends Jul 6, 2041 · High confidence	In force	Term ends Jul 6, 2041	High confidence
US 12,068,381	Transistor, Ternary Inverter Including Same, and Transistor Manufacturing Method In force Term ends Jul 27, 2041 · High confidence	In force	Term ends Jul 27, 2041	High confidence
US 12,009,393	Tunnel Field Effect Transistor and Ternary Inverter Comprising Same In force Term ends Sep 11, 2041 · High confidence	In force	Term ends Sep 11, 2041	High confidence
US 11,923,846	Ternary Logic Circuit In force Term ends Feb 16, 2042 · High confidence	In force	Term ends Feb 16, 2042	High confidence
US 12,484,263	Transistor Device, Ternary Inverter Device Including Same, and Manufacturing Method Therefor In force Term ends Jun 4, 2042 · High confidence	In force	Term ends Jun 4, 2042	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: 4 applications pending. 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.

Export every term end as CSV · Pro

Ternell Co., Ltd.