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:
Jan. 02, 1979
Filed:
Sep. 06, 1977
Applicant:
Inventors:
Assignee:
Chemap AG, Mannedorf, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 75 ;
Abstract
A process for filtering a cellulose acetate solution comprises the steps of providing a solution of cellulose acetate which is dissolved in an organic solvent; adding to the solution a quantity of loose particulate matter and loose fibers so as to form a mixture; and filtering the solution through pores of a filter medium so as to produce a filtrate of the solution, whereby due to addition of the loose particulate matter and the loose fibers clogging of the pores is reduced relative to the amount of filtrate passing through the pores and the effective filtering time of the filtering medium is thereby increased.