THOMAS J HOWELL
Broker in Langhorne, PA
License number
Pennsylvania RM421813
Category
Real Estate Commission
Type
Broker Multi-Licensee-Standard
Address
Address
Langhorne, PA 19053
Professional information
Copolymer Process And Product Therefrom Consisting Of Crosslinked Seed Bead Swollen By Styrene Monomer
US Patent:
4419245, Dec 6, 1983
Filed:
Jun 30, 1982
Appl. No.:
6/393953
Inventors:
James H. Barrett - Feasterville PA
Thomas J. Howell - Langhorne PA
George M. Lein - Doylestown PA
Thomas J. Howell - Langhorne PA
George M. Lein - Doylestown PA
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08F 218, B01J 4114, B01J 3920
US Classification:
210681
Abstract:
A process for the manufacture of crosslinked ion exchange copolymer particles wherein small seed particles are swollen to final size by concurrently feeding monomer and polymerizing the same under controlled suspension conditions and the unique ion exchange particles produced thereby.
Process For Producing An Expanded Seed Copolymer And Product Therefrom
US Patent:
4582859, Apr 15, 1986
Filed:
Dec 2, 1983
Appl. No.:
6/557699
Inventors:
George M. Lein - North Wales PA
Thomas J. Howell - Langhorne PA
James H. Barrett - Feasterville PA
Thomas J. Howell - Langhorne PA
James H. Barrett - Feasterville PA
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08J 916, C08J 922
US Classification:
521 56
Abstract:
An improved process for the manufacture of crosslinked copolymer particles from seed particles by imbibing a monomer therein and polymerizing the same under controlled suspension conditions wherein said improvement comprises expanding the seed in staged or sequential steps of feeding lower levels of crosslinking monomers in the early stages and preferably higher levels of crosslinking monomers at later stages of polymerization.
Ion Exchange Resins
US Patent:
4375519, Mar 1, 1983
Filed:
Sep 22, 1980
Appl. No.:
6/189555
Inventors:
Thomas J. Howell - Langhorne PA
William G. Paterson - Wickham, GB2
Ian Pattison - Washington, GB2
William G. Paterson - Wickham, GB2
Ian Pattison - Washington, GB2
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08F 800, C08F 830, C08F 832, C08F 836
US Classification:
521 31
Abstract:
Hard, infusible, discrete beads of crosslinked copolymer are prepared by free-radical catalyzed polymerization of a monomer mixture in aqueous dispersion wherein a minor amount of a modifier, specifically an organic compound containing acetylenic or allylic unsaturation having the ability to moderate the rate of polymerization, is incorporated in the monomer mixture. Ion exchange resins having improved mechanical strength are obtained by attaching functional groups to the copolymer.
Ion Exchange Resins
US Patent:
4431785, Feb 14, 1984
Filed:
Jan 16, 1981
Appl. No.:
6/225509
Inventors:
Thomas J. Howell - Langhorne PA
William G. Paterson - Wickham, GB2
Ian Pattison - Washington, GB2
William G. Paterson - Wickham, GB2
Ian Pattison - Washington, GB2
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08F 220, C08F21208
US Classification:
526207
Abstract:
Hard, infusible, discrete beads of crosslinked copolymer are prepared by free-radical catalyzed polymerization of a monomer mixture in aqueous dispersion wherein a minor amount of a modifier, specifically an organic compound containing acetylenic or allylic unsaturation having the ability to moderate the rate of polymerization, is incorporated in the monomer mixture. Ion exchange resins having improved mechanical strength are obtained by attaching functional groups to the copolymer.
Ion Exchange Resins
US Patent:
4246386, Jan 20, 1981
Filed:
May 8, 1978
Appl. No.:
5/904178
Inventors:
Thomas J. Howell - Langhorne PA
William G. Paterson - Tyne and Wear, GB2
Ian Pattison - Tyne and Wear, GB2
William G. Paterson - Tyne and Wear, GB2
Ian Pattison - Tyne and Wear, GB2
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08F 238
US Classification:
526207
Abstract:
Hard, infusible, discrete beads of crosslinked copolymer are prepared by free-radical catalyzed polymerization of a monomer mixture in aqueous dispersion wherein a minor amount of a modifier, specifically an organic compound containing acetylenic or allylic unsaturation having the ability to moderate the rate of polymerization, is incorporated in the monomer mixture. Ion exchange resins having improved mechanical strength are obtained by attaching functional groups to the copolymer.
Resins
US Patent:
4283499, Aug 11, 1981
Filed:
Mar 17, 1980
Appl. No.:
6/130923
Inventors:
Thomas J. Howell - Langhorne PA
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C08F21236
US Classification:
521 38
Abstract:
Ion exchange resins having improved physical stability and perfect bead count are prepared by a free-radical catalyzed polymerization of a monomer mixture utilizing certain peroxyester and peroxydicarbonate catalysts, followed by functionalizing the so prepared polymer.