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. 16, 1984
Filed:
Jan. 14, 1980
Applicant:
Inventor:
Marylu B Gibbs, Baton Rouge, LA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
422 40 ; 423335 ; 423336 ; 423337 ;
Abstract
A method for reducing surface-area decay of fluoride-containing fumed silica which comprises the step of providing an atmosphere of inert gas in which the fumed silica is disposed. The method, which can be used at ambient temperature, is particularly effective for the storage of a fluoride-containing fumed silica product prepared by a fluoride process, which fumed silica contains between about 2 and about 4 percent fluoride by weight.