Maintenance fees coming due

Shell USA, Inc.

209 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 19, 2026. Unpaid by May 19, 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 9,035,750	Method and System for State Encoding Shell USA, Inc. In force Fee due Nov 19, 2026 Lapses if unpaid May 19, 2027 Term ends Jun 16, 2028 · High confidence	Shell USA, Inc.	In force	Nov 19, 2026	May 19, 2027	Term ends Jun 16, 2028	High confidence
US 10,294,181	Process for the Preparation of Glycols Shell USA, Inc. In force Fee due Nov 21, 2026 Lapses if unpaid May 21, 2027 Term ends Dec 7, 2036 · High confidence	Shell USA, Inc.	In force	Nov 21, 2026	May 21, 2027	Term ends Dec 7, 2036	High confidence
US 11,655,230	Process for Preparing Ethylene Carbonate and Ethylene Glycol Using an Alkyl Iodide Guard Bed System Shell USA, Inc. In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Dec 10, 2039 · High confidence	Shell USA, Inc.	In force	Nov 23, 2026	May 24, 2027	Term ends Dec 10, 2039	High confidence
US 11,661,491	Reduced Density Thermoplastics Shell USA, Inc., In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Feb 1, 2036 · High confidence	Shell USA, Inc.,	In force	Nov 30, 2026	Jun 1, 2027	Term ends Feb 1, 2036	High confidence
US 9,046,302	Apparatus and Method for Cooling and Liquefying a Fluid Shell USA, Inc. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Aug 27, 2031 · High confidence	Shell USA, Inc.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Aug 27, 2031	High confidence
US 10,308,586	Use of Composition Comprising Titanium or Zirconium Alkoxide or Aryloxide in Aromatic Carbonate Preparation Process Shell USA, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Jan 16, 2036 · High confidence	Shell USA, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Jan 16, 2036	High confidence
US 10,308,863	Formation Preconditioning Using an Aqueous Polymer Preflush Shell USA, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Dec 22, 2036 · High confidence	Shell USA, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Dec 22, 2036	High confidence
US 10,308,877	Process for Production of Aromatics via Pyrolysis of Lignin-Comprising Material Shell USA, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Dec 24, 2035 · High confidence	Shell USA, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Dec 24, 2035	High confidence
US 10,308,889	Lubricity Additives for Fuels Shell Oil Company In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Aug 3, 2038 · High confidence	Shell Oil Company	In force	Dec 4, 2026	Jun 4, 2027	Term ends Aug 3, 2038	High confidence
US 10,309,216	Method of Upscaling a Discrete Fracture Network Model Shell USA, Inc. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Jul 6, 2037 · High confidence	Shell USA, Inc.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Jul 6, 2037	High confidence
199 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 209 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.