Eight patents currently held, every record listed here
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.
The next term ends in Mar 2031. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2031
Next term end
7
Patent families
When these terms end
Each bar runs from grant to computed term end. 2013 to 2039.
US 8,342,002
Inspection Apparatus for Sensor Element, and Method for Inspecting Electrical Characteristics of Sensor Element
Mar 26, 2031
2013201820232028203320382039
1 pending application: term is not computable until grant.Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends May 2035 · High confidence
Also notable
Ends Nov 2033 · High confidence
Also notable
Ends May 2032 · High confidence
Composite Substrate
US 10,211,389
The most cited patent in this portfolio, cited by 11 later US patents, top 25% of utility patents granted in 2019 in our data. Protection runs to 2035.
Composite Substrate and Method for Manufacturing the Same
US 8,901,803
Renewed at every maintenance window since the 2014 grant; no more fees are due before its term ends in 2033.
Method for Manufacturing Sensor Element for Gas Sensor
US 8,646,306
Renewed at every maintenance window since the 2014 grant; no more fees are due before its term ends in 2032.
Formerly held, still cited
Notable
Ends Nov 2033 · High confidence
The most cited patent in this portfolio, cited by 31 later US patents, top 25% of utility patents granted in 2014 in our data. Protection runs to 2033.
now held by NGK Insulators, Ltd.
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 3 largest of its 7 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Composite Substrate | 2 in force | to Jul 2035 |
| Chip Component Manufacturing Method | 1 in force | to Feb 2039 |
| Composite Substrate and Method for Manufacturing the Same | 1 in force | to Nov 2033 |
Patents held now
Soonest term end first.
Showing 1 to 8 of 8
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,342,002 | Inspection Apparatus for Sensor Element, and Method for Inspecting Electrical Characteristics of Sensor Element held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 8,795,491 | Method of Processing Sensor Element and Sensor Element held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 8,359,761 | Measuring Equipment and Method for Forming Laminated Body held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 8,646,306 | Method for Manufacturing Sensor Element for Gas Sensor held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 8,901,803 | Composite Substrate and Method for Manufacturing the Same held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 10,211,389 | Composite Substrate held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 11,239,405 | Method of Producing a Composite Substrate held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence | |
| US 11,538,983 | Chip Component Manufacturing Method held by NGK Insulators, Ltd. and NGK Ceramic Device Co., Ltd. In force · High confidence | In force | High confidence |
Also on record, not counted in the 8: 1 patent in force now held by others · 2 patents ended · 1 application pending · 1 application 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.