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:
Nov. 18, 1980
Filed:
Jul. 23, 1979
Joseph Graham, Oakdale, MN (US);
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Abstract
Fire-retardant granules comprise (1) core particles of hydrated soluble silicate glass that intumesces in the presence of heat, and (2) a solid coating around the core particles that comprises a mixture of (a) halogenated organic compound that releases halogen when heated to a temperature less than about 250.degree. C.; and (b) an iron-containing compound adapted to react with said released halogen to form iron halide. The combined intumescence of the core particle and the catalytic effect of the coating on the particle achieves a unique fire-retarding action, especially in asphalt products such as asphalt shingles, but also in a range of other products.