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:
Apr. 12, 1977
Filed:
Apr. 30, 1975
Applicant:
Inventor:
Eckhard C Schwarz, Neenah, WI (US);
Assignee:
Presto Products, Incorporated, Appleton, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
260 4214 ; 260 4256 ; 328407 ; 428404 ; 427221 ; 1063 / ;
Abstract
Normally hydrophilic inorganic fillers for polymeric resins are modified to enhance their dispersibility in such resins by admixing filler particles with a block copolymer of ethylene oxide and propylene oxide under shear and at an elevated temperature so as to coat the filler particles with a portion of the block copolymer. Thermoplastic polymeric resins, such as polyethylene and polypropylene, containing thus-modified fillers can be conventionally formed into products, such as thin film bags, having improved strength properties.