logo

For the Inventor, By the Inventor

Webster, NY, United States of America

Harold I Machonkin

This inventor holds 9 USPTO granted patents. Top assignee: Eastman-Kodak Company. Active years: 1989-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Harold I Machonkin. Retrieved from https://idiyas.com/inventor/harold-i-machonkin

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 6

Forward Citations = 131(Granted Patents)


Company Filing History:

goldMedal9 out of 21,604 
 
Eastman-Kodak Company
 patents

Years Active: 1989-1997

Loading Chart...
9 patents (USPTO):Explore Patents
1. 5683859 - Photographic developing composition containing a sludge inhibiting agent (1997-11-04),
2. 5232818 - Nucleated high contrast photographic elements containing thioether (1993-08-03),
3. 5196292 - Nucleated high contrast photographic elements containing ballasted (1993-03-23),
4. 5126227 - High contrast photographic elements containing ballasted hydrophobic (1992-06-30),
5. 5041355 - High contrast photographic element including an aryl sulfonamidophenyl (1991-08-20),
6. 4988604 - High contrast photographic element including an aryl sulfonamidophenyl (1991-01-29),
7. 4975354 - Photographic element comprising an ethyleneoxy-substituted amino (1990-12-04),
8. 4912016 - High contrast photographic recording material and emulsion and process (1990-03-27),
9. 4804620 - Photographic material containing a novel polymeric dye-forming coupler (1989-02-14),

Title: Harold I Machonkin: Innovator in Photographic Development

Introduction

Harold I Machonkin is a notable inventor based in Webster, NY (US), recognized for his contributions to the field of photographic development. With a total of 9 patents to his name, he has made significant advancements in the technology used for developing black-and-white photographic elements.

Latest Patents

One of his latest patents is a photographic developing composition containing a sludge inhibiting agent. This improved composition is designed for the development of black-and-white silver halide photographic elements. It includes at least one developing agent and mercapto thiadiazole glycerol propoxylate, which is effective in inhibiting sludge deposition. This developing composition is particularly useful in processes that form high-contrast images, utilizing a silver halide photographic element that comprises a hydrazine compound as a nucleating agent and an amino compound as an incorporated booster. Another significant patent involves nucleated high contrast photographic elements that incorporate a hydrazine compound, an amino compound, and a thioether compound to inhibit pepper fog and restrain image spread.

Career Highlights

Harold I Machonkin has had a distinguished career, primarily working with Eastman Kodak Company. His work has focused on enhancing photographic technologies, particularly in the realm of black-and-white photography. His innovative approaches have contributed to the development of more efficient and effective photographic processes.

Collaborations

Throughout his career, Machonkin has collaborated with esteemed colleagues such as Donald L Kerr and Ping-Wah Tang. These collaborations have further enriched his work and led to advancements in photographic technology.

Conclusion

Harold I Machonkin's contributions to photographic development have made a lasting impact on the industry. His innovative patents and collaborations reflect his dedication to advancing photographic technology. His work continues to influence the field, ensuring high-quality photographic processes for future generations.

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]
Loading…