Maintenance fees coming due

KC Co., Ltd.

10 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 13, 2026. Unpaid by Jun 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 11,674,657	Vehicle Auxiliary Light Luminaire Bezel Attachment Assembly KC IP Holdings, LLC In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends May 8, 2040 · High confidence	KC IP Holdings, LLC	In force	Dec 13, 2026	Jun 14, 2027	Term ends May 8, 2040	High confidence
US 10,390,500	Desalination Membranes for Subsurface Irrigation KC Harvey Environmental, LLC In force Fee due Feb 27, 2027 Lapses if unpaid Aug 27, 2027 Term ends Dec 8, 2036 · High confidence	KC Harvey Environmental, LLC	In force	Feb 27, 2027	Aug 27, 2027	Term ends Dec 8, 2036	High confidence
US 10,421,883	Abrasive Particle-Dispersion Layer Composite and Polishing Slurry Composition Including the Same Kctech Co., Ltd. In force Fee due Mar 24, 2027 Lapses if unpaid Sep 24, 2027 Term ends Dec 21, 2036 · High confidence	Kctech Co., Ltd.	In force	Mar 24, 2027	Sep 24, 2027	Term ends Dec 21, 2036	High confidence
US 10,428,240	Method for Preparing Slurry Composition and Slurry Composition Prepared Thereby Kctech Co., Ltd. In force Fee due Apr 1, 2027 Lapses if unpaid Oct 1, 2027 Term ends Jan 24, 2036 · High confidence	Kctech Co., Ltd.	In force	Apr 1, 2027	Oct 1, 2027	Term ends Jan 24, 2036	High confidence
US 10,428,242	Slurry Composition for Chemical Mechanical Polishing Kctech Co., Ltd. In force Fee due Apr 1, 2027 Lapses if unpaid Oct 1, 2027 Term ends Feb 15, 2038 · High confidence	Kctech Co., Ltd.	In force	Apr 1, 2027	Oct 1, 2027	Term ends Feb 15, 2038	High confidence
US 10,435,587	Polishing Compositions and Methods of Manufacturing Semiconductor Devices Using the Same Kctech Co., Ltd. In force Fee due Apr 8, 2027 Lapses if unpaid Oct 8, 2027 Term ends Jul 20, 2036 · High confidence	Kctech Co., Ltd.	In force	Apr 8, 2027	Oct 8, 2027	Term ends Jul 20, 2036	High confidence
US 9,198,622	Virtual Avatar Using Biometric Feedback KC Holdings I In force Fee due Jun 1, 2027 Lapses if unpaid Dec 1, 2027 Term ends Dec 4, 2033 · High confidence	KC Holdings I	In force	Jun 1, 2027	Dec 1, 2027	Term ends Dec 4, 2033	High confidence
US 10,494,547	Additive Composition and Positive Polishing Slurry Composition Including the Same Kctech Co., Ltd. In force Fee due Jun 3, 2027 Lapses if unpaid Dec 3, 2027 Term ends Dec 15, 2036 · High confidence	Kctech Co., Ltd.	In force	Jun 3, 2027	Dec 3, 2027	Term ends Dec 15, 2036	High confidence
US 10,518,382	Substrate Processing System Kctech Co., Ltd. In force Fee due Jun 30, 2027 Lapses if unpaid Jan 3, 2028 Term ends Feb 16, 2038 · High confidence	Kctech Co., Ltd.	In force	Jun 30, 2027	Jan 3, 2028	Term ends Feb 16, 2038	High confidence
US 10,583,395	Forward Osmosis Subsurface Irrigation System and Process KC Harvey Environmental, LLC In force Fee due Sep 10, 2027 Lapses if unpaid Mar 10, 2028 Term ends Oct 17, 2038 · High confidence	KC Harvey Environmental, LLC	In force	Sep 10, 2027	Mar 10, 2028	Term ends Oct 17, 2038	High confidence

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

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