Maintenance fees coming due

NGK Insulators, Ltd.

411 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 14, 2026. Unpaid by May 14, 2027, that one lapses early.

A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5 and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the six month grace period that follows.

Patent	Title	Holder	Status	Fee due	Lapses if unpaid	Expires	Confidence
US 10,287,942	Honeycomb Type Heating Device and Method for Using the Same NGK Insulators, Ltd. In force Fee due Nov 14, 2026 Lapses if unpaid May 14, 2027 Term ends Jan 3, 2037 · High confidence	NGK Insulators, Ltd.	In force	Nov 14, 2026	May 14, 2027	Term ends Jan 3, 2037	High confidence
US 10,295,602	Device for Calculating Charge/Discharge Condition Adoptable in Secondary Battery of High-Temperature Operation Type NGK Insulators, Ltd. In force Fee due Nov 21, 2026 Lapses if unpaid May 21, 2027 Term ends May 20, 2036 · High confidence	NGK Insulators, Ltd.	In force	Nov 21, 2026	May 21, 2027	Term ends May 20, 2036	High confidence
US 9,041,004	Films of Nitrides of Group 13 Elements and Layered Body Including the Same NGK Insulators, Ltd. In force Fee due Nov 26, 2026 Lapses if unpaid May 26, 2027 Term ends Aug 9, 2032 · High confidence	NGK Insulators, Ltd.	In force	Nov 26, 2026	May 26, 2027	Term ends Aug 9, 2032	High confidence
US 10,300,423	Sealed Honeycomb Structure Hyundai Motor Company, Kia Motors Corporation and NGK Insulators, Ltd. In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Ends no later than Mar 30, 2032 · Medium confidence	Hyundai Motor Company, Kia Motors Corporation and NGK Insulators, Ltd.	In force	Nov 28, 2026	May 28, 2027	Ends no later than Mar 30, 2032	Medium confidence
US 10,301,992	Heater and Honeycomb Structure Including Heater NGK Insulators, Ltd. In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends Feb 7, 2037 · High confidence	NGK Insulators, Ltd.	In force	Nov 28, 2026	May 28, 2027	Term ends Feb 7, 2037	High confidence
US 11,660,635	Method of Manufacturing Tubular Member for Exhaust Gas Treatment Device, and Coating Film Forming Device NGK Insulators, Ltd. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Dec 10, 2041 · High confidence	NGK Insulators, Ltd.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Dec 10, 2041	High confidence
US 11,661,875	Tubular Member for Exhaust Gas Treatment Device and Exhaust Gas Treatment Device Using the Tubular Member, and Method of Manufacturing Tubular Member for Exhaust Gas Treatment Device NGK Insulators, Ltd. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Dec 6, 2041 · High confidence	NGK Insulators, Ltd.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Dec 6, 2041	High confidence
US 11,661,879	Tubular Member for Exhaust Gas Treatment Device and Exhaust Gas Treatment Device Using the Tubular Member, and Method of Manufacturing Tubular Member for Exhaust Gas Treatment Device NGK Insulators, Ltd. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Dec 6, 2041 · High confidence	NGK Insulators, Ltd.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Dec 6, 2041	High confidence
US 11,662,293	Inspection Method for Pillar-Shaped Honeycomb Filter NGK Insulators, Ltd. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Sep 16, 2041 · High confidence	NGK Insulators, Ltd.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Sep 16, 2041	High confidence
US 11,664,203	Electrostatic-Chuck Heater NGK Insulators, Ltd. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Sep 8, 2039 · High confidence	NGK Insulators, Ltd.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Sep 8, 2039	High confidence
401 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 411 patents shown. Soonest fee due date first, then patent number.

Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.

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Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.