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. 30, 1995
Filed:
Jan. 05, 1994
Applicant:
Inventors:
Paul R Johnson, Kaysville, UT (US);
James Bero, Ogden, UT (US);
Jeff G Carter, Morgan, UT (US);
Anthony M Candia, Harrisville, UT (US);
George T Kieger, Salt Lake City, UT (US);
Ronald F Hales, Roy, UT (US);
Fred C Thomas, III, Kaysville, UT (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
B24C / ; B24C / ;
U.S. Cl.
CPC ...
451 39 ; 451 53 ; 451 82 ;
Abstract
The current invention substantially removes particulate waste materials or debris from the floptical medium after laser etching. A low-temperature gas containing ice crystals is applied at a predetermined angle while the floptical medium is being rotated to improve the cleaning effect. The temperature of the disk is maintained above freezing to maintain the cleaning effect.