US PATENT SUBCLASS 252 / 951
.~ For vapor transport
Current as of:
June, 1999
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252 /
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COMPOSITIONS
950
DF
DOPING AGENT SOURCE MATERIAL
{1}
951
.~ For vapor transport
DEFINITION
Classification: 252/951
(under subclass 950) Materials designed for conveying the foreign substance as a gas or vapor or entrained in a gas vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
181.1+, for getters or gas vapor generating materials for electric lamps, electric space discharge devices and similar devices.