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:
May. 05, 1992
Filed:
Feb. 12, 1990
Applicant:
Inventors:
Dwight E Williams, Midland County, MI (US);
Thomas J Tangney, Midland County, MI (US);
Anthony Revis, Saginaw County, MI (US);
Assignee:
Dow Corning Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; B01D / ; B32B / ;
U.S. Cl.
CPC ...
502401 ; 55386 ; 2101982 ; 2101983 ; 210656 ; 252184 ; 427387 ; 428405 ; 428447 ; 502402 ;
Abstract
Porous materials having a dual surface are disclosed. Also disclosed is a method for their preparation. An example of such a material is silica gel reacted with 1,1,1-trifluoropropyldimethylsilyl-N-methylacetamide and then, with N-trimethylsilyl-N-methylacetamide to give a dual treated material having 1,1,1-trifluoropropyldimethylsilyl groups on the exterior surface and trimethylsilyl groups on the porous interior surface.