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. 20, 1990
Filed:
Jul. 07, 1989
Applicant:
Inventor:
Carl R Sahi, Coventry, CT (US);
Assignee:
Bio-Plexus, Inc., Tolland, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128763 ; 604116 ; 604900 ; 128771 ; 374147 ;
Abstract
The penetration of a vein or the like by a fluid collecting or dispensing needle is rapidly confirmed by the transfer of thermal energy from fluid entering the needle bore upon such penetration to a temperature responsive medium in intimate contact with the exterior of the needle. The temperature responsive medium may comprise thermochromic liquid crystals which signal a change in temperature from ambient temperature by changing color.