Katherine L Roberts

US Patent:

20080142453, Jun 19, 2008

Filed:

Dec 5, 2007

Appl. No.:

11/999392

Inventors:

Michael Joseph Unhoch - Tyrone GA, US
Sungmee Choi - Cheshire CT, US
Katherine P. Roberts - Derby CT, US
Leon Peter O'Malley - Hengoed, GB

International Classification:

C02F 1/76
A61K 31/155
A01P 1/00

US Classification:

210755, 514635

Abstract:

The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

US Patent:

20080274208, Nov 6, 2008

Filed:

Apr 29, 2008

Appl. No.:

12/150592

Inventors:

Michael Joseph Unhoch - Tyrone GA, US
Sungmee Choi - Cheshire CT, US
Katherine P. Roberts - Derby CT, US
Leon Peter O'Malley - Hengoed, GB

International Classification:

A61K 33/34
A01P 1/00
A01P 15/00
A01P 13/00

US Classification:

424638

Abstract:

The present invention is directed to a composition for reducing the levels of microorganisms in recreational water systems, comprising: (1) a biocidal effective amount of dibromonitrilopropionamide (DBNPA); (2) optionally, a biocidal effective amount of an algaecide selected from the group consisting of didecyldimethylammonium chloride (DDAC), zinc, and copper; and (3) optionally, a compound capable of in situ activation to form an oxidizing agent; wherein the composition is effective for reducing the levels of microorganisms in recreational water systems. The present invention is also directed to a method of controlling the growth of microorganisms in recreational water systems, comprising the step of providing the above composition; and adding the composition to a recreational water system.

US Patent:

20120207861, Aug 16, 2012

Filed:

Apr 23, 2012

Appl. No.:

13/453278

Inventors:

Michael Joseph UNHOCH - Tyrone GA, US
Sungmee CHOI - Cheshire CT, US
Katherine P. ROBERTS - Derby CT, US
Leon Peter O'MALLEY - Hengoed, GB

Assignee:

ARCH CHEMICALS, INC. - Norwalk CT

International Classification:

A01N 59/02
A01P 3/00
A01P 1/00

US Classification:

424713

Abstract:

The present invention is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.