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. 07, 1996
Filed:
Jul. 29, 1994
Applicant:
Inventors:
Jeffrey K Watkins, Rancho Santa Fe, CA (US);
Walter R Cumiskey, Vista, CA (US);
Victor B McCarthy, Vista, CA (US);
Assignee:
Watkins Manufacturing Corporation, Vista, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 80 ; 264 464 ; 264 468 ; 264512 ; 264514 ; 264553 ; 156 82 ; 427223 ;
Abstract
A process of forming a spa shell by selecting a coextruded polypropylene sheet, selectively heating the sheet, vacuum forming the heated sheet on a deep draw female mold to form a molded spa shell shape, flame treating one surface of the molded shell shape, heating the flame-treated surface, and applying a layer of polyurethane foam to the heated surface.