Maintenance fees coming due
3 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 11,732,076 | Cyclic Diene-Based Copolymers In force Fee due Feb 22, 2027 Lapses if unpaid Aug 23, 2027 · High confidence | Notark Corporation | In force | Feb 22, 2027 | Aug 23, 2027 | High confidence | |
| US 11,851,513 | Poly(CYCLOHEXADIENE) Homopolymer Based Compositions and Uses Thereof In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 · High confidence | Notark Corporation | In force | Jun 26, 2027 | Dec 27, 2027 | High confidence | |
| US 11,873,369 | Polymers Based on Diisoalkenylarenes and Uses Thereof In force Fee due Jul 16, 2027 Lapses if unpaid Jan 18, 2028 · High confidence | Notark Corporation | In force | Jul 16, 2027 | Jan 18, 2028 | High confidence |
3 of 3 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.