Stonehart Associates Inc

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Madison, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Anode electrocatalyst for fuel cell and process of preparing same
- Patent number 5,922,487
- Issue date Jul 13, 1999
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Process of preparing electrode for solid polymer electrolyte fuel cell
- Patent number 5,871,552
- Issue date Feb 16, 1999
- Tanaka Kikinzoku Kogyo K.K.
- Tomoyuki Tada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for forming a catalyst layer on an electrode by spray-drying
- Patent number 5,843,519
- Issue date Dec 1, 1998
- Tanaka Kikinzoku Kogyo K.K.
- Tomoyuki Tada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Sandwich-type solid polymer electrolyte fuel cell
- Patent number 5,800,938
- Issue date Sep 1, 1998
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrode for polymer electrolyte electrochemical cell and process...
- Patent number 5,728,485
- Issue date Mar 17, 1998
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Polymer electrolyte electrochemical cell and process of preparing same
- Patent number 5,607,785
- Issue date Mar 4, 1997
- Tanaka Kikinzoku Kogyo K.K.
- Takeshi Tozawa
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Platinum alloy catalyst
- Patent number 5,593,934
- Issue date Jan 14, 1997
- Tanaka Kikinzoku Kogyo K.K.
- Paul Stonehart
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Ion exchange resins with decreased resistance to ionic conductivity
- Patent number 5,539,002
- Issue date Jul 23, 1996
- Tanaka Kikinzoku Kogyo K.K.
- Masahhiro Watanabe
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Polymer solid-electrolyte composition and electrochemical cell usin...
- Patent number 5,523,181
- Issue date Jun 4, 1996
- Watanabe; Masahiro
- Paul Stonehart
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Process of preparing catalyst supporting highly dispersed metal par...
- Patent number 5,480,851
- Issue date Jan 2, 1996
- Tanaka Kikinzoku Kogyo K.K.
- Kazunori Tsurumi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Solid polymer electrolyte fuel cell
- Patent number 5,472,799
- Issue date Dec 5, 1995
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrode structure for fuel cell
- Patent number 5,453,332
- Issue date Sep 26, 1995
- Tanaka Kikinzoku Kogyo K.K.
- Koichi Sakairi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process of preparing metal supported catalyst having high surface area
- Patent number 5,374,598
- Issue date Dec 20, 1994
- Tanaka Kikinzoku Kogyo K.K.
- Paul Stonehart
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process of preparing catalyst supporting highly dispersed platinum...
- Patent number 5,350,727
- Issue date Sep 27, 1994
- Tanaka Kikinzoku Kogyo K.K.
- Kazunori Tsurumi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process of preparing solid polymer electrolyte type fuel cell
- Patent number 5,294,232
- Issue date Mar 15, 1994
- Tanaka Kikinzoku Kogyo K.K.
- Koichi Sakairi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process of preparing catalyst supporting highly dispersed metal par...
- Patent number 5,275,999
- Issue date Jan 4, 1994
- Tanaka Kikinzoku Kogyo K.K.
- Kazunori Tsurumi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process of preparing catalyst supporting highly dispersed metal par...
- Patent number 5,275,998
- Issue date Jan 4, 1994
- Tanaka Kikinzoku Kogyo K.K.
- Kazunori Tsurumi
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Structure of ion exchange membrane
- Patent number 5,246,792
- Issue date Sep 21, 1993
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Electrocatalyst for anode
- Patent number 5,225,391
- Issue date Jul 6, 1993
- Tanaka Kikinzoku Kogyo K.K.
- Paul Stonehart
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Electrocatalyst
- Patent number 5,208,207
- Issue date May 4, 1993
- Tanaka Kikinzoku Kogyo K.K.
- Paul Stonehart
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Electrocatalyst and process of preparing same
- Patent number 5,189,005
- Issue date Feb 23, 1993
- Tanaka Kikinzoku Kogyo K.K.
- Masahiro Watanabe
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Stonehart Associates Inc

Organization

Patents Grantslast 30 patents

Anode electrocatalyst for fuel cell and process of preparing same

Process of preparing electrode for solid polymer electrolyte fuel cell

Process for forming a catalyst layer on an electrode by spray-drying

Sandwich-type solid polymer electrolyte fuel cell

Electrode for polymer electrolyte electrochemical cell and process...

Polymer electrolyte electrochemical cell and process of preparing same

Platinum alloy catalyst

Ion exchange resins with decreased resistance to ionic conductivity

Polymer solid-electrolyte composition and electrochemical cell usin...

Process of preparing catalyst supporting highly dispersed metal par...

Solid polymer electrolyte fuel cell

Electrode structure for fuel cell

Process of preparing metal supported catalyst having high surface area

Process of preparing catalyst supporting highly dispersed platinum...

Process of preparing solid polymer electrolyte type fuel cell

Process of preparing catalyst supporting highly dispersed metal par...

Process of preparing catalyst supporting highly dispersed metal par...

Structure of ion exchange membrane

Electrocatalyst for anode

Electrocatalyst

Electrocatalyst and process of preparing same

Patents Applicationslast 30 patents

Trademarklast 30 trademarks