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:
Oct. 03, 1995
Filed:
Sep. 16, 1993
Applicant:
Inventors:
William K McDonald, Madison, AL (US);
Philip M O'Larey, Albany, OR (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
2984032 ; 2989053 ; 2989054 ;
Abstract
A method of making a porous plug suitable for use as a phase separator, heat exchanger tube, wherein very small uniform holes are produced in a matrix by placing a first material in a matrix of a second material to form a bundle or billet comprising said materials, reducing the cross-section of the bundle or billet by drawing or extrusion to form a reduced cross-section rod, and then etching away one of the materials to leave a matrix with very small uniform holes therein. The reduced rod may be bundled with other similarly reduced rods to form a bundle which is again drawn to further reduce the cross-section thereof.