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US 5,307,821 AGranted
Tobacco raw material and method for its production
AssigneesAsahi Glass Company, Limited, Japan Tobacco Inc.
InventorsKatsutoshi Misuda, Hitoshi Kijimuta, Kouichi Numata, Masaharu Tanaka, Yoshinori Katayama, Iku Tomari, Toshiro Samejima
Life of this patent
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Abstract
The present invention relates to a method for producing a tobacco raw material having at least a part of its surface coated with a silical gel, which comprises adding silica sol to the tobacco raw material and subjecting the silical gel to gelation.
Claims23
A method for producing a tobacco raw material having at least a part of its surface coated with a layer of silica gel, which comprises adding a silica sol to said tobacco raw material and subjecting the silica gel to gelation.
Dependencies are inferred from the claim text.