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:
Aug. 14, 1979
Filed:
Jul. 11, 1977
Applicant:
Inventors:
Charles A Ward, Toronto, CA;
Walter Zingg, Toronto, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 39 ; 3-14 ; 128D / ; 422 44 ; 264102 ; 264233 ; 264340 ;
Abstract
Method and apparatus are provided for treating one surface of a wall of articles to be used in contact with blood. A solution which is compatible with blood is brought into contact with the surface and a partial vacuum is applied to the wall for a predetermined time period. This partial vacuum causes gas nuclei trapped in irregularities in the surface to permeate through the wall. Consequently when blood displaces the solution there is less likelihood of blood platelets being trapped on the surface with eventual blood clotting.