R.j. Reynolds Tobacco Company

Marvin Glenn Riddick

Jerry Wayne Marshall

Serban C Moldoveanu

Michael F Davis

Anthony Richard Gerardi

Thomas A Perfetti

Paul Andrew Brinkley

William Monroe Coleman, Iii

Wennuan Liu

Watson Minyard Dufour

Stephen Keith Cole

A method of modifying the content of certain chemical compounds in tobacco materials is provided, the method including treatment of a tobacco plant or portion thereof with at least one enzyme. For example, the method may modify the content of tobacco smoke toxicant precursors in tobacco materials, which can result in a modification in toxicant production when the tobacco material is exposed to elevated temperatures. The type of tobacco plant or portion thereof treated according to the invention can be, for example, a tobacco seed, a tobacco seedling, an immature live plant, a mature live plant, a harvested plant, or a plant derivative. Smoking articles and other tobacco products including such enzyme-treated tobacco materials are also provided.

Method for treating tobacco plants with enzymes

A method of preparing a smoke-treated tobacco material is provided, the method including the steps of: (i) subjecting a tobacco material to smoke to give a smoke-treated tobacco material with modified taste characteristics; and (ii) incorporating the smoke-treated tobacco material into a smokeless tobacco product. The invention also provides a smokeless tobacco product incorporating a smoke-treated tobacco material. The smokeless tobacco product may be, for example, a moist snuff tobacco product.

Smoke treatment

A flue-curing apparatus and a related method are provided. The flue-curing apparatus includes a circulation chamber and a curing chamber that are separated by a divider wall. An air circulation system includes a blower positioned in the circulation chamber that directs air to a heater device and a lower passage into the curing chamber. The air may be received from one or both of an inlet and an upper passage extending from the curing chamber to the circulation chamber. A humidity control system humidifies the air directed into the curing chamber. A controller may receive signals from wet and dry bulb thermometers to determine the conditions in the curing chamber and the condition of tobacco leaves being cured therein. The controller may adjust various operational parameters to cause the tobacco leaves in the curing chamber to cure at a desired rate.

Flue-curing apparatus and associated method

A method of modifying the content of certain bacteria in uncured tobacco material is provided, the method including contacting an uncured tobacco material with a treatment solution, wherein the treatment solution is selected from the group consisting of: (i) a solution comprising salt, sugar, or a combination thereof; (ii) a solution comprising one or more enzymes; and (iii) a solution comprising one or more probiotics, wherein said contacting provides a treated tobacco material having a reduced total bacterial content following harvest. In certain embodiments, the treated tobacco material is subsequently cured, and can optionally be fermented. Smoking articles and smokeless tobacco products including such treated tobacco materials are also provided.

Modification of bacterial profile of tobacco

A method for chemically modifying a tobacco material during a curing process involves treating the tobacco material in a curing enclosure at a temperature and for a time sufficient to produce cured tobacco. The method also involves contacting the tobacco material with a chemical reagent before and/or during the time period that the tobacco material is cured so that the chemical reagent can interact with the tobacco material, thus resulting in further change in the chemical nature of the cured tobacco material. An exemplary chemical reagent is an ammonia source, which can be applied to a tobacco material in a variety of ways, including by spraying an aqueous ammonia source onto the tobacco or by introducing gaseous ammonia into the curing enclosure during the curing process.

Growing community of inventors

Winston-Salem, NC, United States of America

Marvin Glenn Riddick