Maintenance fees coming due
9 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 6, 2026. Unpaid by Jun 7, 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 11,667,169 | Spring element, in particular jounce bumper, for a vehicle suspension In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 · High confidence | BASF Polyurethanes GmbH | In force | Dec 6, 2026 | Jun 7, 2027 | High confidence | |
| US 11,685,210 | Jounce Bumper Assembly and Suspension System In force Fee due Dec 27, 2026 Lapses if unpaid Jun 28, 2027 · High confidence | BASF Polyurethanes GmbH | In force | Dec 27, 2026 | Jun 28, 2027 | High confidence | |
| US 11,851,523 | Aging-Resistant Tpu In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 · High confidence | BASF Polyurethanes GmbH | In force | Jun 26, 2027 | Dec 27, 2027 | High confidence | |
| US 10,590,231 | Polyurethanes with Reduced Aldehyde Emission In force Fee due Sep 17, 2027 Lapses if unpaid Mar 17, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Sep 17, 2027 | Mar 17, 2028 | High confidence | |
| US 10,597,531 | Electrically Conductive Particle Foams Based on Thermoplastic Elastomers In force Fee due Sep 24, 2027 Lapses if unpaid Mar 24, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Sep 24, 2027 | Mar 24, 2028 | High confidence | |
| US 11,945,904 | New Flexible Polyurethane Foams In force Fee due Oct 2, 2027 Lapses if unpaid Apr 3, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Oct 2, 2027 | Apr 3, 2028 | High confidence | |
| US 11,952,456 | Process for Preparing a Polyurethane Using a Polyester Polyol Comprising Polycyclic Aromatic Moieties In force Fee due Oct 9, 2027 Lapses if unpaid Apr 10, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Oct 9, 2027 | Apr 10, 2028 | High confidence | |
| US 11,959,526 | Spring element, in particular jounce bumper, for a vehicle suspension In force Fee due Oct 16, 2027 Lapses if unpaid Apr 17, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Oct 16, 2027 | Apr 17, 2028 | High confidence | |
| US 11,970,568 | Ski Boots with Temperature-Independent Modulus of Elasticity In force Fee due Oct 30, 2027 Lapses if unpaid May 1, 2028 · High confidence | BASF Polyurethanes GmbH | In force | Oct 30, 2027 | May 1, 2028 | High confidence |
9 of 9 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.