The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1976
Filed:
Jun. 20, 1973
Applicant:
Inventor:
Roelof Egbert Schuil, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
252300 ; 2523 / ; 313465 ;
Abstract
A cathodochromic sodalite defined by the formula Na.sub.3 Al.sub.3 Si.sub.3 O.sub.12.NaX (X = Cl, Br or J) comprising at least one of the elements tin, lead and germanium in a quantity of between 0.05 and 2 atom % calculated with respect to silicon. The addition of the said elements results in an improvement of the reversible bleaching properties. Notably, a faster and also a more complete bleaching is obtained.