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:
May. 21, 1991
Filed:
Aug. 11, 1986
David L Williams, Richmond, VA (US);
Everett W Southwick, Richmond, VA (US);
Philip Morris Inc., Richmond, VA (US);
Abstract
In one of its embodiments this invention provides smoking compositions which contain a novel unsymmetrical 2,5-diacylpyrazine flavorant additive as illustrated by 1-[5-(1-propanoyl)-2-pyrazinyl]-2-methyl-1-propanone: ##STR1## Under normal cigarette smoking conditions, the 2,5-diacylpyrazine additive volatilizes and enhances the flavor and aroma of the mainstream and sidestream smoke. In another embodiment this invention provides novel unsymmetrical 2,5-diacylpyrazine compounds corresponding to the formula: ##STR2## where R is hydrogen or an alkyl radical containing between about 1-4 carbon atoms; and R.sup.1 and R.sup.2 are alkyl radicals containing between about 1-10 carbon atoms, and R.sup.1 and R.sup.2 are different alkyl groups.