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For the Inventor, By the Inventor

Clifton Park, NY, United States of America

Howard J Klopfer

This inventor holds 8 USPTO granted patents. Top assignee: General Electric Company. Active years: 1976-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Howard J Klopfer. Retrieved from https://idiyas.com/inventor/howard-j-klopfer

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 5

Forward Citations = 55(Granted Patents)


Location History:

  • Elnora, NY (US) (1976)
  • Clifton Park, NY (US) (1977 - 1986)

Company Filing History:

goldMedal8 out of 52,369 
 
General Electric Company
 patents

Years Active: 1976-1986

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8 patents (USPTO):Explore Patents
1. 4565858 - Polyetherimides with high thermal stability and solvent resistance and (1986-01-21),
2. 4460800 - Process for preparation of hydroxyaryldialkylcarbinols (1984-07-17),
3. 4460798 - Process for preparation of asymmetrical bisphenols (1984-07-17),
4. 4293683 - Method for making polyetherimides using carboxylic acid salts of alkali (1981-10-06),
5. 4128731 - Preparation of 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane (1978-12-05),
6. 4105857 - Process for preparing phenyl trichloro-ethanes (1978-08-08),
7. 4049721 - Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene (1977-09-20),
8. 3998840 - Method for making polyetherimides using a sodium chloride or ferric (1976-12-21),

Title: The Innovations of Howard J Klopfer

Introduction

Howard J Klopfer is a notable inventor based in Clifton Park, NY, recognized for his significant contributions to thermoplastic polymers. With a total of eight patents to his name, Klopfer has made strides in the field of materials science, particularly with polyetherimides.

Latest Patents

Klopfer's latest innovations include the development of polyetherimides characterized by high thermal stability and solvent resistance. These materials are derived from bisphenol A dianhydride, or a combination thereof with pyromellitic dianhydride, alongside bis(4-aminophenyl) sulfone or mixtures with m-phenylenediamine and p-phenylenediamine. His work has highlighted the significance of these polyetherimides in industrial applications. Another noteworthy patent involves an improved process for the preparation of asymmetrical bisphenols, specifically 2-(3-hydroxyphenyl)-2-(4-hydroxyphenyl)propane. This process enhances efficiency by reacting hydroxyphenyldialkylcarbinol with phenol in the presence of a hydrogen halide catalyst under controlled conditions.

Career Highlights

Klopfer has made a remarkable impact during his tenure at General Electric Company, where he has focused on the research and development of advanced materials. With eight patents that underline his innovative approach, he has established himself as a key figure in the domain of engineering and polymer science.

Collaborations

Throughout his career, Klopfer has collaborated with distinguished colleagues such as John Robert Campbell and Charles M Orlando. These collaborations have undoubtedly contributed to the success of his projects and the development of groundbreaking technologies in the industry.

Conclusion

Howard J Klopfer's work exemplifies innovation and dedication in the field of materials science. His contributions, particularly in high-performance polyetherimides, continue to have a lasting impact on the industry. As part of a legacy that emphasizes collaboration and advancement, Klopfer remains a significant figure in the realm of inventions and patents.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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