David F. Purdy

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Decatur, GA, US

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Patents Grantslast 30 patents

Information Patent Grant
Solid composition for treating water
- Patent number 7,780,857
- Issue date Aug 24, 2010
- Chemtura Corporation
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Solid composition for treating water
- Patent number 7,625,496
- Issue date Dec 1, 2009
- Chemtura Corporation
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Catalytic oxidation of peroxy salts
- Patent number 7,238,290
- Issue date Jul 3, 2007
- BioLab, Inc.
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Dual layer tablet, method of making and use thereof
- Patent number 6,863,830
- Issue date Mar 8, 2005
- BioLab Services, Inc.
- David F. Purdy
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Patents Applicationslast 30 patents

Information Patent Application
SOLID COMPOSITION FOR TREATING WATER
- Publication number 20100264361
- Publication date Oct 21, 2010
- Chemtura Corporation
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Application
SOLID COMPOSITION FOR TREATING WATER
- Publication number 20100055203
- Publication date Mar 4, 2010
- Chemtura Corporation
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Application
Solid composition for treating water
- Publication number 20080107701
- Publication date May 8, 2008
- Nidhi Rawat
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Application
Catalytic oxidation of peroxy salts
- Publication number 20050147691
- Publication date Jul 7, 2005
- Nidhi Rawat
- C01 - INORGANIC CHEMISTRY
Information Patent Application
DUAL LAYER TABLET, METHOD OF MAKING AND USE THEREOF
- Publication number 20050040116
- Publication date Feb 24, 2005
- David F. Purdy
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE