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:
May. 03, 1983
Filed:
May. 24, 1982
Applicant:
Inventors:
Vincent A Romito, North Hollywood, CA (US);
Loran H Bruso, Ontario, CA (US);
Assignee:
Parke-Davis Company, Morris Plaines, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01N / ;
U.S. Cl.
CPC ...
422 57 ; 116207 ; 374162 ; 422 58 ; 422 87 ; 436-1 ;
Abstract
A sterility indicator device comprising a base of steam permeable, absorbent material, e.g. paperboard, having mounted thereon at least one, though preferably three separate indicator ink spots of chromium chloride that change color in response to predetermined combinations of time, temperature and saturated steam, impermeable transparent cover films bonded to the top surface of the base overlaying the indicator ink spots and to the bottom surface of the base thereby preventing the escape of corrosive reactants there through, and an adhesive substance, to be used to bond the impermeable cover films to the base.