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:
Oct. 21, 1997
Filed:
Jan. 06, 1995
William W Nazaroff, Oakland, CA (US);
Ashok J Gadgil, El Cerrito, CA (US);
Other;
Abstract
An apparatus for treating environmental tobacco smoke (ETS) using a high efficiency particle air filter (HEPA) is provided. The apparatus has a pleated HEPA filter positioned in the top of a housing for filtering ETS particle contaminants. Layers of granulated activated alumina and layers of granulated activated carbon are also positioned in the top of the housing to filter gas-phase ETS contaminants. The apparatus offers substantial improvements over commercially available 'smokeless ashtrays' by more effectively 1) directing ETS smoke over filter components, 2) removing ETS particle contaminants and 3) removing ETS gas-phase contaminants. The apparatus also indicates the effectiveness of the treatment process and allows users to increase the effectiveness of the treatment process.