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:
Nov. 12, 1991
Filed:
Jun. 04, 1990
Applicant:
Inventor:
Bronislaw P Czech, Peekskill, NY (US);
Assignee:
Technicon Instruments Corporation, Tarrytown, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540469 ;
Abstract
A process is disclosed for the non-chromatographic purification of chromogenic cryptahemispherands of the following general formula (II) which are capable of selective binding of sodium ion in aqueous solution: ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl, aryl or benzyl;