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:
Feb. 10, 2004
Filed:
May. 03, 2001
Applicant:
Inventor:
Dilip Gurudath Kalthod, St Louis, MO (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F 1/44 ; R29G 6/500 ;
U.S. Cl.
CPC ...
C02F 1/44 ; R29G 6/500 ;
Abstract
The present invention provides a composite membrane comprising a porous support layer and a selective layer comprising a vinylacetate polymer. The invention also provides a process for preparing a vinylacetate polymer selective layer on a porous support by depositing a colloidal dispersion having colloid particles of the vinylacetate polymer on the porous support followed by annealing the deposited colloids to form a selective layer. The membranes are useful for separation of gas or liquid or vapor mixtures.