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. 03, 1995
Filed:
Sep. 12, 1994
Leonard D Rood, Columbus, OH (US);
Other;
Abstract
A method for manufacturing fire retardant cellulose fibers. The method comprises mixing limestone with shredded cellulosic fibers, mixing an acidic agent with the fibers, and depositing water on the mixture of fibers, limestone and acidic agent. A chemical reaction results from the limestone and the acidic agent being combined in a sufficiently moist environment. The reaction liberates carbon dioxide gas which causes a mechanical foaming action, thereby breaking down and distributing the produced particles of the chemical reaction. The preferred acidic agent is ammonium sulfate combined with boric acid. The method preferably includes the application of an anti-static agent in the step that includes mixing the limestone with the fibers. The water deposited preferably comprises an amount substantially in a range from 6%-16% of the weight of the fibers.