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For the Inventor, By the Inventor

Bergisch Gladbach, Germany

Hans-Albrecht Freitag

USPTO Granted Patents = 11

Average Co-Inventor Count = 3.2

ph-index = 6

Forward Citations = 88(Granted Patents)


Location History:

  • Coraopolis, PA (US) (1987)
  • Pittsburgh, PA (US) (1988)
  • Leichlingen, DE (1992)
  • Bergisch-Gladbach, DE (1982 - 1994)

Company Filing History:

goldMedal10 out of 12,157 
 
Bayer Aktiengesellschaft
 patents
silverMedal1 out of 539 
 
Miles Inc.
 patents

Years Active: 1982-1994

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11 patents (USPTO):Explore Patents
1. 5342855 - Stable dispersions of polyhydrazodicarbonamides useful in the (1994-08-30),
2. 5109035 - Process for the production of moldings or films of cross-linked (1992-04-28),
3. 4824595 - Polyisocyanate compositions containing reversibly blocked catalysts and (1989-04-25),
4. 4761307 - Process for the production of optionally foamed polyurethanes which are (1988-08-02),
5. 4644017 - Process for the production of polyisocyanate addition products and (1987-02-17),
6. 4644016 - Process for the production of polyurethanes (1987-02-17),
7. 4618532 - Upholstered seat having an air-permeable covering and a cold foam core (1986-10-21),
8. 4510269 - Process for the production of optionally cellular polyurethanes (1985-04-09),
9. 4390640 - Process for the production of optionally-foamed polyurethanes (1983-06-28),
10. 4379861 - Process for the production of polyurethanes using morpholine compounds (1983-04-12),
11. 4320067 - Process for the preparation of modified polyisocyanates (1982-03-16),

Title: The Innovations of Hans-Albrecht Freitag

Introduction

Hans-Albrecht Freitag is a notable inventor based in Bergisch Gladbach, Germany. He has made significant contributions to the field of polymer chemistry, particularly in the development of stable dispersions and polyurethane foams. With a total of 11 patents to his name, Freitag's work has had a lasting impact on various industrial applications.

Latest Patents

Freitag's latest patents include a process for the preparation of stable dispersions of polyhydrazodicarbonamides. This invention relates to a method for creating stable dispersions in hydroxyl-containing compounds through the reaction of organic isocyanates and isocyanate-reactive compounds. These dispersions are particularly useful in producing polyurethane foams with exceptional hardness. Another significant patent involves a process for thermoplastically molding a specific foam composition, which is formed by reacting isocyanates with low molecular weight polyols in the presence of a blowing agent.

Career Highlights

Throughout his career, Freitag has worked with prominent companies such as Bayer Aktiengesellschaft and Miles Inc. His experience in these organizations has allowed him to refine his expertise in polymer chemistry and contribute to innovative solutions in the industry.

Collaborations

Freitag has collaborated with notable colleagues, including Geza Avar and Peter Haas. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the field.

Conclusion

Hans-Albrecht Freitag's contributions to polymer chemistry and his innovative patents have established him as a significant figure in the industry. His work continues to influence the development of advanced materials and applications.

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