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:
Aug. 22, 1989
Filed:
Apr. 15, 1987
Applicant:
Inventors:
Donald J Cram, Los Angeles, CA (US);
Eddy Chapoteau, Brooklyn, NY (US);
Bronislaw P Czech, Peekskill, NY (US);
Carl R Gebauer, Crompond, NY (US);
Roger C Helgeson, Canuga Park, CA (US);
Anand Kumar, Southfields, NY (US);
Koon-Wah Leong, Ossining, NY (US);
Assignees:
Technicon Instruments Corporation, Tarrytown, NY (US);
The Regents of the University of California, Berkeley, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07C / ;
U.S. Cl.
CPC ...
436 79 ; 422 50 ; 422 68 ; 534752 ; 540469 ;
Abstract
The present invention resides in the discovery of a class of compounds defined herein as 'chromogenic cryptahemispherands' useful for the measurement of ions, in particular, ions in aqueous solution, which have the structure ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;