Method for Generating a Gas Which May Be Used for Startup and Shutdown of a Fuel Cell

Rolls-Royce plc

A patent family: one line of work, grouped by real continuity rather than by a technology label inferred from titles. 5 of these applications claim priority to application 12/554,039, filed Sep 4, 2009. A shared origin can cover several different claimed inventions, which is why members here may not share a title. In-force patents first, soonest term end first, then patent number. Expired patents follow, in the same order.

Patent	Title	Holder	Status	Expires	Time remaining	Confidence
US 8,557,458	Method for Generating a Gas Which May Be Used for Startup and Shutdown of a Fuel Cell Rolls-Royce PLC In force Term ends Sep 4, 2029 · High confidence	Rolls-Royce PLC	In force	Term ends Sep 4, 2029	Term ends Sep 4, 2029	High confidence
US 9,874,158	Engine Systems and Methods of Operating an Engine Rolls-Royce PLC In force Term ends Sep 4, 2029 · Medium confidence	Rolls-Royce PLC	In force	Term ends Sep 4, 2029	Term ends Sep 4, 2029	Medium confidence
US 8,597,841	Method for Generating a Gas Which May Be Used for Startup and Shutdown of a Fuel Cell Rolls-Royce PLC In force Term ends May 1, 2031 · High confidence	Rolls-Royce PLC	In force	Term ends May 1, 2031	Term ends May 1, 2031	High confidence
US 10,167,194	Reducing Gas Generators and Methods for Generating Reducing Gas Rolls-Royce PLC In force Term ends Jun 30, 2031 · Medium confidence	Rolls-Royce PLC	In force	Term ends Jun 30, 2031	Term ends Jun 30, 2031	Medium confidence
US 9,178,235	Reducing Gas Generators and Methods for Generating a Reducing Gas Rolls-Royce PLC In force Term ends Oct 19, 2031 · High confidence	Rolls-Royce PLC	In force	Term ends Oct 19, 2031	Term ends Oct 19, 2031	High confidence
US 10,087,895	Engine Systems That Are Supplied with Reformed Fuel Rolls-Royce PLC In force Term ends Nov 8, 2031 · High confidence	Rolls-Royce PLC	In force	Term ends Nov 8, 2031	Term ends Nov 8, 2031	High confidence
US 8,668,752	Apparatus for Generating a Gas Which May Be Used for Startup and Shutdown of a Fuel Cell Rolls-Royce PLC In force Term ends Dec 16, 2031 · High confidence	Rolls-Royce PLC	In force	Term ends Dec 16, 2031	Term ends Dec 16, 2031	High confidence
US 9,118,048	Engine systems and methods of operating an engine Rolls-Royce PLC In force Term ends Feb 24, 2032 · Medium confidence	Rolls-Royce PLC	In force	Term ends Feb 24, 2032	Term ends Feb 24, 2032	Medium confidence
US 9,083,020	Reducing gas generators and methods for generating reducing gas Rolls-Royce PLC In force Term ends Mar 5, 2032 · High confidence	Rolls-Royce PLC	In force	Term ends Mar 5, 2032	Term ends Mar 5, 2032	High confidence
US 9,140,220	Engine Systems and Methods of Operating an Engine Rolls-Royce PLC In force Term ends Jun 15, 2034 · High confidence	Rolls-Royce PLC	In force	Term ends Jun 15, 2034	Term ends Jun 15, 2034	High confidence

10 of 10 records shown. In-force patents first, soonest term end first, then patent number. Expired patents follow, in the same order.

Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

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