Maintenance fees coming due

Daramic, LLC

19 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 16, 2026. Unpaid by May 17, 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 11,652,260	Composite Layers or Separators for Lead Acid Batteries Daramic, LLC In force Fee due Nov 16, 2026 Lapses if unpaid May 17, 2027 Term ends Mar 15, 2038 · High confidence	Daramic, LLC	In force	Nov 16, 2026	May 17, 2027	Term ends Mar 15, 2038	High confidence
US 11,664,557	Separators with Fibrous Mat, Lead Acid Batteries Using the Same, and Methods and Systems Associated Therewith Daramic, LLC In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Feb 26, 2038 · Medium confidence	Daramic, LLC	In force	Nov 30, 2026	Jun 1, 2027	Term ends Feb 26, 2038	Medium confidence
US 10,329,425	Batteries, Separators, Components, and Compositions with Heavy Metal Removal Capability and Related Methods Daramic, LLC In force Fee due Dec 25, 2026 Lapses if unpaid Jun 25, 2027 Term ends Nov 10, 2031 · High confidence	Daramic, LLC	In force	Dec 25, 2026	Jun 25, 2027	Term ends Nov 10, 2031	High confidence
US 11,705,582	Separators for Flat Plate Batteries, Improved Batteries, and Related Methods Daramic, LLC In force Fee due Jan 18, 2027 Lapses if unpaid Jul 19, 2027 Term ends Dec 21, 2035 · High confidence	Daramic, LLC	In force	Jan 18, 2027	Jul 19, 2027	Term ends Dec 21, 2035	High confidence
US 11,705,583	Battery Separators with Improved Conductance, Improved Batteries, Systems, and Related Methods Daramic, LLC In force Fee due Jan 18, 2027 Lapses if unpaid Jul 19, 2027 Term ends Sep 1, 2037 · High confidence	Daramic, LLC	In force	Jan 18, 2027	Jul 19, 2027	Term ends Sep 1, 2037	High confidence
US 10,388,931	Functionalized Lead Acid Battery Separators, Improved Lead Acid Batteries, and Related Methods Daramic, LLC In force Fee due Feb 20, 2027 Lapses if unpaid Aug 20, 2027 Term ends Oct 26, 2036 · High confidence	Daramic, LLC	In force	Feb 20, 2027	Aug 20, 2027	Term ends Oct 26, 2036	High confidence
US 11,742,550	Lead Acid Battery Separators, Batteries, and Related Methods Daramic, LLC In force Fee due Feb 28, 2027 Lapses if unpaid Aug 30, 2027 Term ends Feb 7, 2039 · High confidence	Daramic, LLC	In force	Feb 28, 2027	Aug 30, 2027	Term ends Feb 7, 2039	High confidence
US 11,766,642	Microporous Membranes, Underlayment, Roofing, Flashing, Wrap, and Methods for Making and Using the Same Daramic, LLC In force Fee due Mar 26, 2027 Lapses if unpaid Sep 27, 2027 Term ends Jun 22, 2040 · High confidence	Daramic, LLC	In force	Mar 26, 2027	Sep 27, 2027	Term ends Jun 22, 2040	High confidence
US 9,190,648	Lead-Acid Battery Separator Having Enhanced Stiffness Daramic LLC In force Fee due May 17, 2027 Lapses if unpaid Nov 17, 2027 Term ends Aug 29, 2028 · High confidence	Daramic LLC	In force	May 17, 2027	Nov 17, 2027	Term ends Aug 29, 2028	High confidence
US 11,840,632	Batteries, Separators, Components, and Compositions with Heavy Metal Removal Capability and Related Methods Daramic, LLC In force Fee due Jun 12, 2027 Lapses if unpaid Dec 13, 2027 Term ends Nov 18, 2031 · High confidence	Daramic, LLC	In force	Jun 12, 2027	Dec 13, 2027	Term ends Nov 18, 2031	High confidence
9 more maintenance fees coming due in the 12 months from Nov 15, 2026 · Pro

10 of 19 patents shown. Soonest fee due date first, then patent number.

Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.

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Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.