Coating processes – Measuring – testing – or indicating
Reexamination Certificate
2006-01-23
2011-12-27
Chen, Bret (Department: 1715)
Coating processes
Measuring, testing, or indicating
C427S249200, C427S255120, C427S900000
Reexamination Certificate
active
08084079
ABSTRACT:
A method of densifying a porous substrate with pyrolytic carbon includes loading the substrate into an oven, admitting a reaction gas mixture to the oven, extracting an effluent gas from the oven, and recycling components of the effluent gas into the reaction gas mixture. The reaction gas mixture contains a pyrolytic carbon precursor gas together with a vector gas. The effluent gas contains residual components of the reaction gas mixture together with reaction products, including hydrogen. The recycling is performed after eliminating heavy hydrocarbons contained in the effluent gas.
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Bernard Bruno
Bertrand Sébastien
Domblides Jean-Luc
Robin-Brosse Christian
Thebault Jacques
Chen Bret
Snecma Propulsion Solide
Weingarten Schurgin, Gagnebin & Lebovici LLP
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