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. 29, 1991
Filed:
Sep. 26, 1990
Richard L Lehman, Belle Mead, NJ (US);
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Abstract
Cigarettes include tobacco-containing smokable material wrapped in a low porosity paper wrapper. The smokable material includes an intimate mixture of tobacco extract, pyrolyzed alphacellulose, agglomerated calcium carbonate particles, glycerin and carboxymethylcellulose. The agglomerated calcium carbonate particles are provided by providing an agglomerated matrix of calcium carbonate particles and organic binding agent, and calcining the organic binding agent. The resulting agglomerated matrix includes particles of calcium carbonate within a carbonaceous binding material. Such cigarettes yield low levels of incomplete combustion products and generate low levels of visible sidestream smoke.