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:
Jun. 27, 1995
Filed:
Dec. 14, 1990
Applicant:
Inventors:
Alan G Miller, St. Paul, MN (US);
Balchunis: Robert J, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544115 ; 544343 ; 544348 ;
Abstract
3,7-Diamo phenazine dye having at least one electron-withdrawing substituent on at least one of the groups attached to the amine groups at the 3- and 7-positions, provided that the algebraic sum of the para position Hammett sigma (.rho..sub.p) values for the groups attached to the nitrogen atoms of the amine groups at the 3- and 7-positions is more positive khan about -0.6. The group containing the electron-withdrawing substituent can be selected from
Miller, Alan. (1995). Phenazine dyes (U.S. Patent No. 5428161). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5428161
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