1
Karim Zahedi, Jeffrey C Alexander: Filter apparatus and method for collecting fly ash and fine dust. EFB, Shapiro and Shapiro, December 29, 1981: US04308036 (47 worldwide citation)

Fly ash and fine dust in a gas stream from a coal combustor, for example, are efficiently collected in a 2-stage, tubular, granular bed filter. The stages of the filter are arranged one above the other so that the granules may move from the upper stage to the lower stage under the influence of gravi ...


2
Karim Zahedi, Jeffery Alexander, Peter Zieve: Apparatus and method for controlling pollutant emissions and for enhancing the manufacture of asphaltic roofing. EFB, Shapiro and Shapiro, March 13, 1979: US04144359 (30 worldwide citation)

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 po ...


3
Jeffrey Alexander, Karim Zahedi: Method for treating gas streams. EFB, Shapiro and Shapiro, May 26, 1987: US04668489 (27 worldwide citation)

A gaseous constituent such as SO.sub.2, HCl, or HF is removed from a gas stream in a granular bed filter containing granules coated with a sorbent material which is reactive with the gaseous constituent. Granules carrying reacted sorbent material are removed from the granular bed filter, cleaned of ...


4
James R Melcher, Kenneth S Sachar, Karim Zahedi: Electrofluidized beds for collection of particulate. Massachusetts Institute of Technology, Arthur A Smith Jr, Robert Shaw, Martin Santa, July 26, 1977: US04038049 (20 worldwide citation)

Apparatus for the high performance collection of gas entrained particulate, especially submicron particulate, consisting of a fluidized bed of collection sites with an electric field imposed on the bed so that the particulate to be collected, which is charged prior to entering the bed with the fluid ...


5
Karim Zahedi, Jeffrey C Alexander: Filter apparatus and method for collecting fly ash and fine dust. EFB, Shapiro and Shapiro, February 22, 1983: US04374652 (16 worldwide citation)

Fly ash and fine dust in a gas stream from a coal combustor, for example, are efficiently collected in a 2-stage, tubular, granular bed filter. The stages of the filter are arranged one above the other so that the granules may move from the upper stage to the lower stage under the influence of gravi ...


6
James R Melcher, Jeffrey C Alexander, Karim Zahedi: Electrofluidized bed agglomerator and method of agglomerating. Massachusetts Institute of Technology, Arthur A Smith Jr, Robert Shaw, March 27, 1979: US04146371 (16 worldwide citation)

An electrofluidized bed agglomerator and method of agglomerating which comprises agglomerating submicron (and/or supermicron) particulates with a liquid, said liquid acting as a bond between particulates of the agglomerate thus formed to maintain the integrity thereof.


7
Jeffery C Alexander, Karim Zahedi: Method for treating gas streams. EFB, Shapiro and Shapiro, September 17, 1985: US04542000 (13 worldwide citation)

A gaseous constituent, such as sulfur dioxide, is removed from a gas stream in a granular bed filter containing granules coated with a sorbent material which is reactive with the gaseous constituent. Granules carrying reacted sorbent material are removed from the granular bed filter, cleaned of reac ...


8
James R Melcher, Jeffrey C Alexander, Karim Zahedi: Fluidized bed particulate collectors. Massachusetts Institute of Technology, Arthur A Smith Jr, Robert Shaw, May 15, 1979: US04154585 (12 worldwide citation)

A fluidized bed, particulate collector system wherein, in one embodiment, the bed particles have applied thereto at the surface thereof, an additive that serves to adhere particulate, once collected, to the bed particles. The bed particles and/or additive may be combustible or may be incombustible. ...


9
Karim Zahedi, Jeffrey C Alexander, Peter B Zieve: Filter apparatus. EFB, Shapiro and Shapiro, March 19, 1985: US04505723 (11 worldwide citation)

Electrified filter bed apparatus includes inner and outer cylindrical bed-retaining structures for confining a granular bed therebetween. The inner cylindrical structure may comprise a cage of superposed frusto-conical louvers and the outer structure may comprise a similar cage or a perforated cylin ...


10
Karim Zahedi: Apparatus and method using an electrified filter bed for removal of pollutants from a flue gas stream. Miles & Stockbridge PC, December 13, 2005: US06974494 (10 worldwide citation)

Pollutants in a flue gas stream from a dryer of products, such as wood chips, are removed by a pollution abatement system that includes an electrified filter bed unit for removing solid particulates. To prevent deteriorated operation of the electrified filter bed unit due to condensation of volatile ...