US PATENT SUBCLASS 523 / 138
.~.~ Composition for contact with hot propulsion or exhaust gas or process of preparing

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


523 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
138.~.~ Composition for contact with hot propulsion or exhaust gas or process of preparing

DEFINITION

Classification: 523/138

Composition for contact with hot propulsion or exhaust gas or process of preparing:

(under subclass 1) Subject matter wherein a composition which is to be in contact with either a hot propulsion gas or exhaust has is claimed or solely disclosed or to processes of preparation thereof.

(1) Note. For an explanation of patent placement referring

to claimed or solely disclosed, see (in the class definition) the section of SEARCH THIS CLASS, SUBCLASS that refers to this subclass.

(2) Note. Included herein are compositions which line the combustion chamber of a rocket motor or the exhaust system of an automobile or space vehicle.

(3) Note. Ablative compositions which are to be in contact with hot propulsion or exhaust gases are included herein.

(4) Note. A compositions which is to be in contact with hot propulsion or exhaust gases which is not solely disclosed is placed as appropriate in Classes 523 and 524 hereinbelow.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179, for an ablative composition not designed to be in contact with hot propulsion or exhaust gases.