Douglass E. Hughes

Person

Boulder, CO, US

People

Patents Grantslast 30 patents

Information Patent Grant
Filtration matrix
- Patent number 7,374,680
- Issue date May 20, 2008
- 3M Innovative Properties Company
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Porous polymer water filter and methods of use in refrigeration
- Patent number 7,169,304
- Issue date Jan 30, 2007
- 3M Innovative Properties Company
- Douglass E. Hughes
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Gas porous polymer filter and methods of use
- Patent number 7,112,280
- Issue date Sep 26, 2006
- 3M Innovative Properties Company
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Liquid and gas porous plastic filter and methods of use
- Patent number 7,112,272
- Issue date Sep 26, 2006
- 3M Innovative Properties Company
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Gravity-flow filtration cartridge for the removal of microorganisms...
- Patent number 6,524,477
- Issue date Feb 25, 2003
- Rich Buhler
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Automatic valved bottle cap for use with liquid containers
- Patent number 6,523,711
- Issue date Feb 25, 2003
- Douglass E. Hughes
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Automatic valved filter assembly
- Patent number 6,468,435
- Issue date Oct 22, 2002
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Universal filter for soda pop and bottled water bottles
- Patent number 6,395,170
- Issue date May 28, 2002
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Filter housing
- Patent number D448448
- Issue date Sep 25, 2001
- Douglass E. Hughes
- D23 - Environmental heating and cooling
Information Patent Grant
Shower filter for chlorine removal and scale deposit prevention
- Patent number 6,267,887
- Issue date Jul 31, 2001
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Shower filter for chlorine removal and scale deposit prevention
- Patent number 6,096,197
- Issue date Aug 1, 2000
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Continuous flow water-purifying device
- Patent number 5,407,573
- Issue date Apr 18, 1995
- Alpine Water Purification, Inc.
- Douglass E. Hughes
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Patents Applicationslast 30 patents

Information Patent Application
FILTRATION MATRIX
- Publication number 20070062862
- Publication date Mar 22, 2007
- 3M Innovative Properties Company
- Douglass E Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Liquid and gas porous plastic filter and methods of use
- Publication number 20040168972
- Publication date Sep 2, 2004
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Gas porous polymer filter and methods of use
- Publication number 20040168973
- Publication date Sep 2, 2004
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Porous polymer water filter and methods of use in refrigeration
- Publication number 20040168974
- Publication date Sep 2, 2004
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Universal filter for soda pop and bottled water bottles
- Publication number 20020036176
- Publication date Mar 28, 2002
- Douglass E. Hughes
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Douglass E. Hughes

Person

Patents Grantslast 30 patents

Filtration matrix

Porous polymer water filter and methods of use in refrigeration

Gas porous polymer filter and methods of use

Liquid and gas porous plastic filter and methods of use

Gravity-flow filtration cartridge for the removal of microorganisms...

Automatic valved bottle cap for use with liquid containers

Automatic valved filter assembly

Universal filter for soda pop and bottled water bottles

Filter housing

Shower filter for chlorine removal and scale deposit prevention

Shower filter for chlorine removal and scale deposit prevention

Continuous flow water-purifying device

Patents Applicationslast 30 patents

FILTRATION MATRIX

Liquid and gas porous plastic filter and methods of use

Gas porous polymer filter and methods of use

Porous polymer water filter and methods of use in refrigeration

Universal filter for soda pop and bottled water bottles