Dianne M Rothstein

US Patent:

20040219683, Nov 4, 2004

Filed:

Jul 23, 2003

Appl. No.:

10/625416

Inventors:

Robert Taylor - Lansdale PA, US
Dianne Rothstein - Ambler PA, US

Assignee:

Severn Trent Water Purification Inc. - Colmar PA

International Classification:

G01N033/00

US Classification:

436/125000

Abstract:

Methods of measuring free and total chlorine content in solutions are provided without lowering the pH of the solution to the acid range by modifying a solution containing chlorine and water to contain a proton donating compound and electrochemically measuring the concentration of the chlorine in the solution. An additional potassium iodide reagent is added when total chlorine content is measured. Stable aqueous reagent solutions useful in automated chlorine analyzers which contain sodium bicarbonate, a base, and water or borax, water, and acid are also described. Finally, apparatuses for detecting the level of chlorine in water samples utilizing an automated chlorine detector, a cartridge having a solid proton donating compound, and optionally a standpipe are discussed.

US Patent:

20090005536, Jan 1, 2009

Filed:

Jun 24, 2008

Appl. No.:

12/145051

Inventors:

MARC L. ROTHSTEIN - Ambler PA, US
Dianne M. Rothstein - Ambler PA, US
Dan P. Lee - Reno NV, US

Assignee:

Prime Synthesis, Inc. - Aston PA

International Classification:

C07K 1/04
C07H 21/00
B05D 7/00
B32B 5/16

US Classification:

530334, 536 253, 427221, 428406

Abstract:

A method for preparing a crosslinked polymer coated controlled porosity glass (CPG) particle is provided. The method involves mixing CPG particles in a solution comprising polyvinylbenzylchloride and a first solvent at a temperature below 10 C. A second solvent is added and a crosslinking agent is added to the mixture. The first solvent is removed rapidly within 1 hours of addition of the crosslinking agent. The crosslinking reaction is permitted to proceed and the mixture is then cooled and treated to remove any remaining solvent. The resulting coated CPG particles are washed and dried. Also provided a polymer coated CPG particles using for loading ligand thereon.

US Patent:

20150133648, May 14, 2015

Filed:

Jan 19, 2015

Appl. No.:

14/599787

Inventors:

- Aston PA, US
Dianne M. Rothstein - Ambler PA, US
Dan P. Lee - Reno NV, US

International Classification:

C07H 21/00

US Classification:

536 253, 427212

Abstract:

A method for preparing a crosslinked polymer coated controlled porosity glass (CPG) particle is provided. The method involves mixing CPG particles in a solution comprising polyvinylbenzylchloride and a first solvent at a temperature below 10 C. A second solvent is added and a crosslinking agent is added to the mixture. The first solvent is removed rapidly within hours of addition of the crosslinking agent. The crosslinking reaction is permitted to proceed and the mixture is then cooled and treated to remove any remaining solvent. The resulting coated CPG particles are washed and dried. Also provided a polymer coated CPG particles using for loading ligand thereon.

US Patent:

20140087189, Mar 27, 2014

Filed:

Dec 4, 2013

Appl. No.:

14/096081

Inventors:

- Aston PA, US
Dianne M. Rothstein - Ambler PA, US
Dan P. Lee - Reno NV, US

Assignee:

Prime Synthesis, Inc. - Aston PA

International Classification:

C07H 21/00

US Classification:

428406, 536 253, 427212

Abstract:

A method for preparing a crosslinked polymer coated controlled porosity glass (CPG) particle is provided. The method involves mixing CPG particles in a solution comprising polyvinylbenzylchloride and a first solvent at a temperature below 10 C. A second solvent is added and a crosslinking agent is added to the mixture. The first solvent is removed rapidly within 1 hours of addition of the crosslinking agent. The crosslinking reaction is permitted to proceed and the mixture is then cooled and treated to remove any remaining solvent. The resulting coated CPG particles are washed and dried. Also provided a polymer coated CPG particles using for loading ligand thereon.