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. 18, 1989
Filed:
Jul. 27, 1987
Applicant:
Inventors:
Geoffrey W Westwood, Walsall, GB;
Raymond A Higgins, Rednal, GB;
Assignee:
Hepworth Minerals and Chemicals, Limited, Surrey, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; B22C / ;
U.S. Cl.
CPC ...
164527 ; 164 16 ; 264 83 ; 523145 ; 528147 ; 5281585 ; 528161 ;
Abstract
Foundry molds and cores are prepared by using as a binder a phenolic resin in solution in aqueous sodium hydroxide and using an ester to cure the binder. The ester may be incorporated in the mixture prior to shaping, or the ester in gaseous form may be passed through the shaped mixture.