Maintenance fees coming due
5 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 27, 2026. Unpaid by Jun 28, 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 11,689,118 | Converter with Power Management System for Household Users to Manage Power Between Different Loads Including Their Electric Vehicle In force Fee due Dec 27, 2026 Lapses if unpaid Jun 28, 2027 · High confidence | Dcbel Inc. | In force | Dec 27, 2026 | Jun 28, 2027 | High confidence | |
| US 11,811,300 | Isolated Converter In force Fee due May 7, 2027 Lapses if unpaid Nov 8, 2027 · High confidence | Dcbel Inc. | In force | May 7, 2027 | Nov 8, 2027 | High confidence | |
| US 11,831,235 | Multi-Level Power Converter with Software Control of Switches and Deadtime In force Fee due May 28, 2027 Lapses if unpaid Nov 29, 2027 · High confidence | Dcbel Inc. | In force | May 28, 2027 | Nov 29, 2027 | High confidence | |
| US 11,923,671 | Photovoltaic Rapid Shutdown and Arc Sensing System In force Fee due Sep 5, 2027 Lapses if unpaid Mar 6, 2028 · High confidence | Dcbel Inc. | In force | Sep 5, 2027 | Mar 6, 2028 | High confidence | |
| US 11,949,342 | Multiple Port Power Converter Device In force Fee due Oct 2, 2027 Lapses if unpaid Apr 3, 2028 · High confidence | Dcbel Inc. | In force | Oct 2, 2027 | Apr 3, 2028 | High confidence |
5 of 5 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.