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:
Mar. 24, 1998
Filed:
Feb. 25, 1997
Charles Bradford Rhoades, Jr, Clemmons, NC (US);
Ralph Thomas White, Jr, Pfafftown, NC (US);
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Abstract
An environmental evaporation chamber for preparing analytical samples is constructed of a plurality of separable, preferably glass, components especially designed for ease of use and low-cost manufacture. The chamber comprises an open-ended cylindrical body portion with a plurality of legs on one end thereof, a bottom tray on which the body portion is placed with the legs resting thereon to provide a gap for the exhaust of a purge gas, and a top cover which fits snugly on the upper edge of the body portion. A purge gas is introduced via a gas inlet adjacent the upper edge of the body portion and flows therethrough and exits through the gap at the lower edge of the body portion. A sample support may be provided in the body portion to raise the height of the sample into closer proximity to a heating element disposed above the top cover. A method of using the evaporation chamber involves removal and replacement of only the top cover component without the need to move the other components.