Maintenance fees coming due

Delta Electronics, Inc.

406 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 30, 2026. Unpaid by Jun 1, 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 11,661,956	Fan Frame Delta Electronics, Inc. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Aug 23, 2038 · High confidence	Delta Electronics, Inc.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Aug 23, 2038	High confidence
US 11,664,728	Power Conversion Device Delta Electronics, Inc. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Jan 18, 2042 · High confidence	Delta Electronics, Inc.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Jan 18, 2042	High confidence
US 11,665,824	Power Converter Module Delta Electronics, Inc. In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Jan 12, 2041 · High confidence	Delta Electronics, Inc.	In force	Nov 30, 2026	Jun 1, 2027	Term ends Jan 12, 2041	High confidence
US 9,046,751	Optical Excitation Device, Light Source Module, and Projector Using the Same Delta Electronics, Inc. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Nov 22, 2033 · High confidence	Delta Electronics, Inc.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Nov 22, 2033	High confidence
US 9,048,722	Current Equalizing Busbar Delta Electronics, Inc. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Jan 15, 2034 · High confidence	Delta Electronics, Inc.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Jan 15, 2034	High confidence
US 9,049,437	Solid State Illuminator for Stereoscopic Display Delta Electronics, Inc. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Aug 30, 2033 · High confidence	Delta Electronics, Inc.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Aug 30, 2033	High confidence
US 10,307,960	Three-Dimensional Printer and Imaging System Thereof Delta Electronics, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Feb 7, 2037 · High confidence	Delta Electronics, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Feb 7, 2037	High confidence
US 10,309,617	Phosphor Wheel Delta Electronics, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Sep 26, 2037 · High confidence	Delta Electronics, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Sep 26, 2037	High confidence
US 10,310,363	Phosphor Device Delta Electronics, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Sep 14, 2032 · Medium confidence	Delta Electronics, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Sep 14, 2032	Medium confidence
US 10,313,140	Power Distribution Unit, Power Distribution System and Network-Connecting Relay Method Thereof Delta Electronics, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Jun 15, 2037 · High confidence	Delta Electronics, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Jun 15, 2037	High confidence
396 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 406 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.