Howard J. Klopfer

Person

Clifton Park, NY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Polyetherimides with high thermal stability and solvent resistance...
- Patent number 4,565,858
- Issue date Jan 21, 1986
- General Electric Company
- Howard J. Klopfer
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for preparation of asymmetrical bisphenols
- Patent number 4,460,798
- Issue date Jul 17, 1984
- General Electric Company
- Howard J. Klopfer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparation of hydroxyaryldialkylcarbinols
- Patent number 4,460,800
- Issue date Jul 17, 1984
- General Electric Company
- Charles M. Orlando
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for making polyetherimides using carboxylic acid salts of al...
- Patent number 4,293,683
- Issue date Oct 6, 1981
- General Electric Company
- Tohru Takekoshi
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Preparation of 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane
- Patent number 4,128,731
- Issue date Dec 5, 1978
- General Electric Company
- Howard J. Klopfer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing phenyl trichloro-ethanes
- Patent number 4,105,857
- Issue date Aug 8, 1978
- General Electric Company
- John R. Campbell
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene
- Patent number 4,049,721
- Issue date Sep 20, 1977
- General Electric Company
- John E. Corn
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for making polyetherimides using a sodium chloride or ferric...
- Patent number 3,998,840
- Issue date Dec 21, 1976
- General Electric Company
- Frank J. Williams
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Howard J. Klopfer

Person

Patents Grantslast 30 patents

Polyetherimides with high thermal stability and solvent resistance...

Process for preparation of asymmetrical bisphenols

Process for preparation of hydroxyaryldialkylcarbinols

Method for making polyetherimides using carboxylic acid salts of al...

Preparation of 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane

Process for preparing phenyl trichloro-ethanes

Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene

Method for making polyetherimides using a sodium chloride or ferric...