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. 07, 2003
Filed:
Mar. 30, 2001
Applicant:
Inventors:
James A. Stevenson, St. Paul, MN (US);
Geoffrey P. Morris, White Bear Lake, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 2/160 ;
U.S. Cl.
CPC ...
G03B 2/160 ;
Abstract
Projection screens and convenient and efficient methods of making such projection screens are provided. Recycled glass is reformed to provide glass microspheres of sufficient quality for use in a projection screen.