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. 11, 1977
Filed:
Feb. 19, 1975
Applicant:
Inventor:
Pui Kum Lee, White Bear Lake, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C10L / ; C06B / ;
U.S. Cl.
CPC ...
252408 ; 44 51 ; 44 59 ; 149 18 ; 149 195 ; 149 1991 ; 149 21 ; 1491094 ; 428373 ; 428378 ; 428381 ; 428383 ; 428407 ;
Abstract
An improvement in the known method of tagging individual units of production of a substance with microparticles for retrospective identification is disclosed. The improvement comprises the use of microparticles which are encoded with an orderly sequence of visually distinguishable colored segments. Decoding of the microparticles can be accomplished with a microscope or other magnifying device.