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:
Jul. 08, 1980
Filed:
May. 04, 1978
Applicant:
Inventor:
Robert C Brumfield, Pasadena, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B01K / ;
U.S. Cl.
CPC ...
156644 ; 156645 ; 156668 ; 2103 / ; 2103 / ; 427-2 ; 427 / ; 428376 ; 428398 ; 428409 ;
Abstract
In blood dialyzers in which hollow fibers are potted in plastic tube sheets and the tube sheets are then cut to form a manifold surface providing access to the interior of the hollow fibers, blood clotting at the manifold surface is greatly reduced by treating the surface to increase the radii of the microscopic sharp edges of the fiber ends which are produced by the cutting process. The smoothing of the fiber ends can be accomplished by momentary heating, flame polishing, etching, or coating of the manifold surface with a varnish.