Maintenance fees coming due

K&N Engineering, Inc.

25 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 13, 2027. Unpaid by Aug 13, 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 10,378,491	Aircharger Air Intake System and Method K&N Engineering, Inc. In force Fee due Feb 13, 2027 Lapses if unpaid Aug 13, 2027 Term ends Mar 8, 2037 · High confidence	K&N Engineering, Inc.	In force	Feb 13, 2027	Aug 13, 2027	Term ends Mar 8, 2037	High confidence
US 11,724,226	Air Filter Precleaner K&N Engineering, Inc. In force Fee due Feb 15, 2027 Lapses if unpaid Aug 16, 2027 Term ends Aug 6, 2041 · High confidence	K&N Engineering, Inc.	In force	Feb 15, 2027	Aug 16, 2027	Term ends Aug 6, 2041	High confidence
US 11,738,297	Hydrocarbon Absorbing Air Filter Box K&N Engineering, Inc. In force Fee due Feb 28, 2027 Lapses if unpaid Aug 30, 2027 Term ends Nov 22, 2041 · High confidence	K&N Engineering, Inc.	In force	Feb 28, 2027	Aug 30, 2027	Term ends Nov 22, 2041	High confidence
US 10,406,547	Sprayer Nozzle Support K&N Engineering, Inc. In force Fee due Mar 10, 2027 Lapses if unpaid Sep 10, 2027 Term ends Nov 20, 2035 · High confidence	K&N Engineering, Inc.	In force	Mar 10, 2027	Sep 10, 2027	Term ends Nov 20, 2035	High confidence
US 11,773,794	Throttle Controlled Intake System K&N Engineering, Inc. In force Fee due Apr 3, 2027 Lapses if unpaid Oct 4, 2027 Ends no later than Jul 23, 2040 · Medium confidence	K&N Engineering, Inc.	In force	Apr 3, 2027	Oct 4, 2027	Ends no later than Jul 23, 2040	Medium confidence
US 10,434,466	HVAC System Air Filter K&N Engineering, Inc. In force Fee due Apr 8, 2027 Lapses if unpaid Oct 8, 2027 Ends no later than Jan 3, 2037 · Medium confidence	K&N Engineering, Inc.	In force	Apr 8, 2027	Oct 8, 2027	Ends no later than Jan 3, 2037	Medium confidence
US 10,456,727	Reusable Air Filter System and Method K&N Engineering, Inc. In force Fee due Apr 29, 2027 Lapses if unpaid Oct 29, 2027 Term ends Aug 23, 2037 · High confidence	K&N Engineering, Inc.	In force	Apr 29, 2027	Oct 29, 2027	Term ends Aug 23, 2037	High confidence
US 11,808,241	Aircharger Air Intake System and Method K&N Engineering, Inc. In force Fee due May 7, 2027 Lapses if unpaid Nov 8, 2027 Term ends Apr 8, 2037 · High confidence	K&N Engineering, Inc.	In force	May 7, 2027	Nov 8, 2027	Term ends Apr 8, 2037	High confidence
US 10,473,066	Air Filter for Turbochargers and Superchargers K&N Engineering, Inc. In force Fee due May 12, 2027 Lapses if unpaid Nov 12, 2027 Term ends Apr 9, 2037 · High confidence	K&N Engineering, Inc.	In force	May 12, 2027	Nov 12, 2027	Term ends Apr 9, 2037	High confidence
US 11,826,687	Cone Air Filter K&N Engineering, Inc. In force Fee due May 28, 2027 Lapses if unpaid Nov 29, 2027 Ends no later than Aug 1, 2037 · Medium confidence	K&N Engineering, Inc.	In force	May 28, 2027	Nov 29, 2027	Ends no later than Aug 1, 2037	Medium confidence
15 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 25 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.