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:
Jun. 18, 1996
Filed:
Nov. 23, 1994
Charles T Bridges, Midlothian, VA (US);
Charles R Howe, Richmond, VA (US);
John B Paine, III, Midlothian, VA (US);
Kenneth F Podraza, Richmond, VA (US);
Philip Morris Incorporated, New York, NY (US);
Philip Morris Products, Inc., Richmond, VA (US);
Abstract
A main aspect of this invention is the provision of a liquid medium for scrubbing contaminants from an environmental gas-phase. Toxic chemicals such as phosphine and arsine are removed from a gas-phase stream by contacting the gas-phase stream with an aqueous medium which oxidizes the contaminants to water-soluble or water-dispersible type derivatives. The aqueous medium has a content of redox ingredients illustrated by compounds such as silver nitrate, hydrogen peroxide, sodium tungstate, and sulfuric acid.