Title:
1-phenyl-3, 3-dimethylspiro[(2'h-1'-benzopyran)-2', 2'-indoline] compound
United States Patent 3231584
US Patent References:
Cyanine dyestuff
- - 2338782
Phototropic data storage capsules and base coated therewith
- - 2953454
Optical information-processing apparatus and method
- - 3085469
Derivatives of 1,3,3 trimethyl-spiro (2'h-1'-benzopyran-2,2'-indolene)
- - 3100778
Cyanine dyestuff
- - 2338782
Phototropic data storage capsules and base coated therewith
- - 2953454
Optical information-processing apparatus and method
- - 3085469
Derivatives of 1,3,3 trimethyl-spiro (2'h-1'-benzopyran-2,2'-indolene)
- - 3100778
Inventors:
Elliot, Berman
Taylor, John E. G.
Taylor, John E. G.
Publication Date:
01/25/1966
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Export Citation:
Assignee:
NCR CO
Primary Class:
Other Classes:
359/241, 548/490, 252/586
International Classes:
C07D491/10; G03C1/685; C07D491/00