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. 13, 1979
Filed:
Nov. 22, 1977
Applicant:
Inventors:
Karim Zahedi, Brookline, MA (US);
Jeffery Alexander, Belmont, MA (US);
Peter Zieve, Belmont, MA (US);
Assignee:
EFB Inc., Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; C23C / ;
U.S. Cl.
CPC ...
427 39 ; 55131 ; 55138 ; 55427 ; 118 495 ; 118 61 ; 118310 ; 427186 ; 427215 ; 427255 ;
Abstract
Pollutant emissions produced in the manufacture of asphaltic roofing are controlled by the use of electrified bed filters. Filter bed granules coated with pollutants are removed from the beds periodically and are used in the manufacture of the roofing. A prefilter is employed to remove varnishing pollutant components in the supermicron size range to prevent fouling of an electrical charger.