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For the Inventor, By the Inventor

Rochester, NY, United States of America

Karl H Drexhage

This inventor holds 5 USPTO granted patents. Top assignee: Eastman-Kodak Company. Active years: 1977-1983.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Karl H Drexhage. Retrieved from https://idiyas.com/inventor/karl-h-drexhage

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 4

Forward Citations = 149(Granted Patents)


Company Filing History:

goldMedal5 out of 21,604 
 
Eastman-Kodak Company
 patents

Years Active: 1977-1983

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5 patents (USPTO):Explore Patents
1. 4416961 - Color imaging devices and color filter arrays using photo-bleachable dyes (1983-11-22),
2. 4345011 - Color imaging devices and color filter arrays using photo-bleachable dyes (1982-08-17),
3. 4247799 - Color imaging devices and color filter arrays using photo-bleachable dyes (1981-01-27),
4. 4212519 - Light control device and fabrication methods therefor (1980-07-15),
5. 4051374 - Imaging device having improved blue response (1977-09-27),

Title: Innovations of Karl H Drexhage in Color Imaging Technology

Introduction

Karl H Drexhage is a notable inventor based in Rochester, NY (US), recognized for his contributions to color imaging technology. He holds a total of 5 patents, showcasing his innovative approach to developing advanced imaging devices.

Latest Patents

Drexhage's latest patents focus on color imaging devices and color filter arrays utilizing photo-bleachable dyes. These color filter arrays are constructed in a single layer of a transparent binder that contains at least one cationic photo-bleachable dye. The layer is designed to have a thickness of less than 10 microns, with the dye present in sufficient amounts to achieve a density of at least about 0.5 in the spectrum where it selectively absorbs. The method for creating these arrays involves several steps: forming a layer of a transparent binder with the photo-bleachable dye and a sensitizer, exposing the layer to a pattern representing filter elements to photo-bleach the dye, and finally fixing the layer by leaching the sensitizer. In preferred embodiments, the dyes are selected so that those absorbing at longer wavelengths exhibit lower bleaching efficiency compared to those absorbing at shorter wavelengths.

Career Highlights

Drexhage has made significant strides in his career, particularly through his work at Eastman Kodak Company. His innovative patents have contributed to advancements in imaging technology, enhancing the capabilities of color imaging devices.

Collaborations

Throughout his career, Drexhage has collaborated with notable colleagues, including Robert L Lamberts and Joseph J Wrobel. These collaborations have further enriched his work and contributed to the development of innovative imaging solutions.

Conclusion

Karl H Drexhage's contributions to color imaging technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in imaging devices and technologies.

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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