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:
Jan. 15, 1991
Filed:
Apr. 17, 1989
Applicant:
Inventor:
David K Douden, Richfield, MN (US);
Assignee:
Minnesota Mining and Manufacturing, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C03C / ;
U.S. Cl.
CPC ...
501128 ; 501127 ; 501133 ; 501 84 ; 501 66 ; 501 33 ;
Abstract
Thin flakes can be made from a sol of metal oxides by a method analogous to blowing soap bubbles, preferably by directing a laminar flow of air through a narrow, annular orifice. The bubbles can be dried and broken into fragments which are fired to produce refractory flakes that can be incorporated into protective coatings. The resulting coatings can be pearlescent while also affording good resistance to abrasion and to corrosive materials.