James T. Dew
Engineering at Rr 1, Jeannette, PA
License number
Louisiana EI.0006061
Issued Date
Jan 1, 1900
Category
Civil Engineer
Address
Address
1 Rr 1 BOX 215, Jeannette, PA 15644
Professional information
Particulate Amorphous Precipitated Silica
US Patent:
5353999, Oct 11, 1994
Filed:
Feb 16, 1993
Appl. No.:
8/017082
Inventors:
James T. Dew - Jeannette PA
Larry R. Evans - Jeannette PA
Walter H. Waddell - Pittsburgh PA
Larry R. Evans - Jeannette PA
Walter H. Waddell - Pittsburgh PA
Assignee:
PPG Industries, Inc. - Pittsburgh PA
International Classification:
B02C 408
US Classification:
241 30
Abstract:
A statistically large population of particles of amorphous precipitated silica is substantially free of particles of amorphous precipitated silica which are retained on a 20 mesh sieve screen, and is characterized by at least 90 percent by weight of said particles of said population being retained on a 200 mesh sieve screen. Such a population may be produced by cracking amorphous precipitated silica particles between the textured rolls of at least one roll pair.
Amorphous Precipitated Silica Having Large Liquid Carrying Capacity
US Patent:
5906843, May 25, 1999
Filed:
Jun 3, 1997
Appl. No.:
8/868107
Inventors:
James T. Dew - Jeannette PA
Larry R. Evans - Jeannette PA
Diana L. Scott - Derry PA
Walter H. Waddell - Pittsburgh PA
Larry R. Evans - Jeannette PA
Diana L. Scott - Derry PA
Walter H. Waddell - Pittsburgh PA
Assignee:
PPG Industries, Inc. - Pittsburgh PA
International Classification:
C01B 3312
US Classification:
426 2
Abstract:
Substantially dry free-flowing particles of amorphous precipitated silica have large sizes and large carrying capacities for organic liquids, and they contain little or no dust.