Company Filing History:

13 out of 1,473

Agfa-gevaert Ag

patents

3 out of 21

Agfa-gevaert Aktiengesellshcaft

Years Active: 1977-1994

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5362615 - Photographic recording material containing a hydroquinone diether (1994-11-08),

2. 4952487 - Color photographic recording material (1990-08-28),

3. 4943519 - Light sensitive, stabilized photographic recording material (1990-07-24),

4. 4942068 - Curtain coating process (1990-07-17),

5. 4894324 - Hardeners for proteins, a layer of binder hardened therewith and a (1990-01-16),

6. 4845024 - Hardeners for proteins, a binder layer hardened therewith and a (1989-07-04),

7. 4840890 - Hardened proteinic binder layer (1989-06-20),

8. 4810625 - Photographic material with pyrazolone coupler and oil former (1989-03-07),

9. 4749643 - Photographic recording element containing a UV absorbent and a silver (1988-06-07),

10. 4464464 - Color photographic recording material (1984-08-07),

11. 4349624 - Photographic silver halide material (1982-09-14),

12. 4339515 - Method of stabilizing color photographic materials and a color (1982-07-13),

13. 4338394 - Process for hardening photographic gelatin (1982-07-06),

14. 4330606 - Color photographic materials and color photographic images (1982-05-18),

15. 4323646 - Process for hardening a photographic material (1982-04-06),

Title: The Innovative Contributions of Johannes Sobel

Introduction

Johannes Sobel is a notable inventor based in Leverkusen, Germany. He has made significant contributions to the field of photographic technology, holding a total of 17 patents. His work has advanced the development of color photographic materials, showcasing his expertise and innovative spirit.

Latest Patents

Among his latest patents is a photographic recording material that contains a hydroquinone diether. This invention features a color-photographic recording material comprising at least one red-sensitive silver halide emulsion layer associated with a cyan coupler, a green-sensitive silver halide emulsion layer associated with a magenta coupler, and a blue-sensitive silver halide emulsion layer associated with a yellow coupler. The material is characterized by increased light stability of the image colorants produced during chromogenic development. Another significant patent involves the combination of oil formers of the alkylphenol type with 3-anilinopyrazolones, which shows absorption maxima displaced towards longer wavelengths, thereby reducing yellow secondary density.

Career Highlights

Johannes Sobel has worked with prominent companies in the photographic industry, including Agfa-Gevaert AG and Agfa-Gevaert Aktiengesellschaft. His career has been marked by a commitment to innovation and excellence in photographic technology.

Collaborations

Throughout his career, Sobel has collaborated with esteemed colleagues such as Wolfgang Himmelmann and Karl-Wilhelm Schranz. These partnerships have contributed to the advancement of his inventions and the overall progress in the field.

Conclusion

Johannes Sobel's contributions to photographic technology through his numerous patents highlight his role as a leading inventor in the industry. His innovative work continues to influence the development of photographic materials and techniques.

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