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:
Jul. 20, 1993
Filed:
Mar. 12, 1992
Howard J Cohen, Baltimore, MD (US);
SCM Chemicals, Inc., Baltimore, MD (US);
Abstract
The subject invention is a new type of silica gel and process for producing the same. The silica gel is the product of gelling alkali metal silicate with excess acid in aqueous medium containing a minute amount a polymerization modifier. The modifier and salts from the resulting gel are then leached with water before substantial drying effects have ensued. Spray-dried gel particles do not require the additional steps of aging or ammonia treating to achieve the desired result of high surface area and high pore volume. The gel can be produced to have various useful and unusual characteristics including the combination of high surface area, high pore volume, and a large average pore diameter.