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. 13, 2003
Filed:
Jun. 18, 2001
Applicant:
Inventors:
Raymond L. Wellman, El Cerito, CA (US);
Michael S. Cork, Richardson, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 9/14 ;
U.S. Cl.
CPC ...
F16L 9/14 ;
Abstract
A self-grounding laminated dual wall fume duct for transporting corrosive vapors and gases, and a process for fabricating the inner and outer walls. The innermost layer of the inner wall is made of a cured epoxy vinyl ester resin incorporating continuous carbon fibers forming a continuous surface integrated with the inner surface of the innermost layer. The electrically conductive fibers act to dissipate and neutralize electrostatic charges generated by triboelectric processes.