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:
Sep. 30, 1980
Filed:
Mar. 08, 1979
Warren K Cline, Brevard, NC (US);
Stuart W McCarty, Brevard, NC (US);
William F Owens, Jr, Pisgah Forest, NC (US);
Olin Corporation, Pisgah Forest, NC (US);
Abstract
A method for producing high porosity, high carbon content cigarette papers in which a paper substrate having an initial Filtrona porosity of at least 10,000 air permeability units is coated with an aqueous suspension containing from 10 to 50% by weight finely divided carbon, up to 3% by weight of a water-soluble binder, and from 0.5 to 3% by weight of an alkali metal carbonate and thereafter dried resulting in a coated paper having a Filtrona porosity of not less than 5,000 air permeability units. Carbon coated cigarette papers made in accordance with the foregoing method may be used as the inner wrapper for the tobacco column of a cigarette in combination with an outer wrapper of porous or perforated cigarette paper to provide substantial reductions in the constituent yields in the mainstream and sidestream smoke emanating from the cigarette without increasing the carbon monoxide yield obtained in the smoke from the cigatette when compared to conventional cigarettes containing a single wrap of standard cigarette paper.