Title:
Method of providing a black layer on a metal object
United States Patent 3326648


Inventors:
Henri, Provisor
Application Number:
US27549563A
Publication Date:
06/20/1967
Filing Date:
04/25/1963
Assignee:
PHILIPS CORP
Primary Class:
Other Classes:
148/275, 252/62.3R, 420/576, 427/77, 427/123, 427/229, 427/383.7, 428/652, 428/656, 428/680, 428/927, 428/929, 428/936
International Classes:
H01J9/04; H01J19/00
View Patent Images:
US Patent References:
Foreign References:
DE478754C1929-07-02
DE932858C1955-09-12