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:
Mar. 09, 1993
Filed:
Apr. 04, 1989
Applicant:
Inventors:
Philip A Guadagno, Vidor, TX (US);
Janine P Burrows, Orange, TX (US);
Assignee:
Helena Laboratories Corporation, Beaumont, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01N / ;
U.S. Cl.
CPC ...
422 56 ; 436 66 ;
Abstract
A method of formulating a test ink for a fecal occult blood test product including the steps of: (a) providing at least one chromogen reagent in a first solution; (b) providing a moisture barrier which is a water-soluble polymer; (c) adding at least one oxygen donor reagent to the moisture barrier; (d) adding at least one color enhancer to the result of step (c) to thereby form a second solution; and (e) adding the second solution to the first solution.