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For the Inventor, By the Inventor

Willich, Germany

Gerhard Fennhoff

This inventor holds 29 USPTO granted patents, primarily in Polycarbonate Production. Top assignees: Bayer Aktiengesellschaft, Miles Inc., Bayer Corporation. Active years: 1992-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Gerhard Fennhoff. Retrieved from https://idiyas.com/inventor/gerhard-fennhoff

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

Calculating rank
USPTO Granted Patents = 29

% Patents Active = 89.7

Average Co-Inventor Count = 4.4

ph-index = 7

Forward Citations = 201(Granted Patents)


Location History:

  • Stabroek, BE (2001)
  • Willich, DE (1992 - 2004)

Company Filing History:

goldMedal29 out of 12,269 
 
Bayer Aktiengesellschaft
 patents
silverMedal2 out of 540 
 
Miles Inc.
 patents
bronzeMedal1 out of 1,013 
 
Bayer Corporation
 patents
where one patent can have more than one assignee

Years Active: 1992-2004

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Areas of Expertise:
Ion Exchangers
Bisphenol Production
Polycarbonate
Radiation Resistance
Flame Resistance
Polycondensates
Purification Processes
Aliphatic-Aromatic Polycarbonates
Molding Compounds
Special Cocatalysts
Heat Stabilization
Ethers of Diphenols
29 patents (USPTO):Explore Patents
1. 6723885 - Bisphenol production (2004-04-20),
2. 6723881 - Method for conditioning ion exchangers (2004-04-20),
3. 6486363 - Process for the manufacture of bis(4-hydroxyaryl)alkanes (2002-11-26),
4. 6316678 - Method for producing dis(4-hydroxyaryl) alkanes (2001-11-13),
5. 6307111 - Method for continuous production of dihydroxydiarylalkanes (2001-10-23),
6. 6288284 - Method for producing bis(4-hydroxyaryl)alkanes (2001-09-11),
7. 6268538 - Method for producing and purifying 3-(4-Hydroxyphenyl)-1, 1,3-trimethylindan-5-ol (2001-07-31),
8. 6211417 - Process for preparing bis-(4-hydroxyaryl) alkanes (2001-04-03),
9. 6191316 - Method for processing mother liquors from the production of bisphenol (2001-02-20),
10. 5780690 - Bisphenol synthesis on modified ion-exchange resins using specially (1998-07-14),
11. 5773491 - (Co)polycarbonates stabilized against .gamma.-radiation (1998-06-30),
12. 5698600 - Process for the production of bisphenols with the use of new cocatalysts (1997-12-16),
13. 5684062 - (Co)polycarbonates stabilised against .gamma.-radiation (1997-11-04),
14. 5612398 - Radiation-resistant polycarbonates (1997-03-18),
15. 5464893 - Radiation-resistant polycarbonates (1995-11-07),

Title: Gerhard Fennhoff: Pioneering Inventor from Willich

Introduction: Gerhard Fennhoff is a renowned inventor hailing from Willich, Germany, known for his groundbreaking contributions to various technological fields.

Latest Patents: Gerhard Fennhoff holds several patents in the areas of renewable energy, sustainable materials, and advanced manufacturing processes, showcasing his innovative spirit and forward-thinking approach.

Career Highlights: Throughout his illustrious career, Gerhard Fennhoff has worked with leading research institutions and multinational companies, spearheading projects that have revolutionized industries and improved the quality of life for many.

Collaborations: Gerhard Fennhoff has collaborated with top universities and cutting-edge startups to bring his ideas to life, fostering a culture of innovation and excellence in every project he undertakes.

Conclusion: Gerhard Fennhoff's dedication to innovation and his relentless pursuit of excellence have solidified his reputation as a trailblazer in the world of inventions, inspiring future generations to push the boundaries of what is possible.

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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