Maintenance fees coming due
4 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 11,664,561 | Cylindrical Secondary Cell and a Method of Its MAN18-12090 In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 · High confidence | Northvolt AB | In force | Nov 30, 2026 | Jun 1, 2027 | High confidence | |
| US 11,670,815 | Cylindrical Secondary Cell In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 · High confidence | Northvolt AB | In force | Dec 6, 2026 | Jun 7, 2027 | High confidence | |
| US 11,757,160 | Cylindrical Secondary Cell and a Method of Its Manufacture In force Fee due Mar 12, 2027 Lapses if unpaid Sep 13, 2027 · High confidence | Northvolt AB | In force | Mar 12, 2027 | Sep 13, 2027 | High confidence | |
| US 11,888,182 | Secondary Cell In force Fee due Jul 30, 2027 Lapses if unpaid Jan 31, 2028 · High confidence | Northvolt AB | In force | Jul 30, 2027 | Jan 31, 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.