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:
Feb. 12, 1991
Filed:
Apr. 15, 1987
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);
Technicon Instruments Corporation, Tarrytown, NY (US);
The Regents of the University of California, Berkeley, CA (US);
Abstract
The present invention resides in the discovery of a new class of compounds defined herein as 'chromogenic hemispherands' useful for the measurement of ions, in particular, ions in aqueous solution, methods of using the chromogenic hemispherands and test devices containing the chromogenic hemispherands. The chromogenic hemispherands of the invention have the structure ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;