Maintenance fees coming due
4 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 22, 2027. Unpaid by Aug 23, 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 11,730,842 | Ozone Disinfection Device, Ozone Disinfection System, and Ozone Disinfection Method In force Fee due Feb 22, 2027 Lapses if unpaid Aug 23, 2027 · Medium confidence | Dcstar Inc. | In force | Feb 22, 2027 | Aug 23, 2027 | Medium confidence | |
| US 11,872,346 | Breathing Mask with a Foam Pad In force Fee due Jul 16, 2027 Lapses if unpaid Jan 18, 2028 · High confidence | Dcstar Inc. | In force | Jul 16, 2027 | Jan 18, 2028 | High confidence | |
| US 11,975,149 | Low-Noise Breathing Mask In force Fee due Nov 7, 2027 Lapses if unpaid May 8, 2028 · High confidence | Dcstar Inc. | In force | Nov 7, 2027 | May 8, 2028 | High confidence | |
| US 11,975,150 | Device for Delivering Gas In force Fee due Nov 7, 2027 Lapses if unpaid May 8, 2028 · High confidence | Dcstar Inc. | In force | Nov 7, 2027 | May 8, 2028 | High confidence |
4 of 4 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.