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For the Inventor, By the Inventor

Watford, United Kingdom

Llewellyn J Leyshon

USPTO Granted Patents = 14

Average Co-Inventor Count = 3.0

ph-index = 4

Forward Citations = 36(Granted Patents)


Location History:

  • Waford, GB (1999)
  • Hertfordshire, GB (2001)
  • Harrow, GB (1988 - 2004)
  • Watford, GB (1988 - 2004)
  • Herts, GB (2004)

Company Filing History:

goldMedal14 out of 21,594 
 
Eastman-kodak Company
 patents

Years Active: 1988-2004

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14 patents (USPTO):Explore Patents
1. 6790585 - Method for developing a high contrast photographic material containing a polyhydrazide nucleating agent (2004-09-14),
2. 6756189 - Photographic elements containing cyan coupler UV absorber and stabilizer (2004-06-29),
3. 6713226 - High contrast photographic element containing a polyhydrazide nucleating agent (2004-03-30),
4. 6699650 - Photographic couplers having improved image dye light stability (2004-03-02),
5. 6444417 - Photographic element containing cyan dye-forming coupler (2002-09-03),
6. 6444412 - Photographic element with dye-forming coupler and stabilizing compound (2002-09-03),
7. 6312881 - Photographic element with yellow dye-forming coupler and stabilizing compounds (2001-11-06),
8. 6245480 - High contrast photographic element containing a novel nucleator (2001-06-12),
9. 6071683 - Image dye-forming couplers and photographic elements containing them (2000-06-06),
10. 6004738 - Photographic elements containing cyan dye-forming coupler, coupler (1999-12-21),
11. 5021333 - Color photographic element, compounds and process (1991-06-04),
12. 4782011 - Bisphenol derivative stabilizers (1988-11-01),
13. 4777121 - Substituted pyrazolo[3, 2-c]-s-triazole photographic couplers and (1988-10-11),
14. 4749645 - Heterocyclic phosphorus compound stabilizers (1988-06-07),

Title: Llewellyn J Leyshon: Innovator in Photographic Technology

Introduction

Llewellyn J Leyshon is a prominent inventor based in Watford, GB. He has made significant contributions to the field of photographic technology, holding a total of 14 patents. His work has greatly influenced the development of photographic materials and processes.

Latest Patents

Among his latest patents is a method for developing a high contrast photographic material containing a polyhydrazide nucleating agent. Additionally, he has developed photographic elements that contain a cyan coupler UV absorber and stabilizer. This particular invention discloses a color photographic element that includes one or more cyan dye-forming couplers, a UV absorber, and a specific class of stabilizer, resulting in improved stability for the imaging process.

Career Highlights

Llewellyn J Leyshon has had a successful career at Eastman Kodak Company, where he has been instrumental in advancing photographic technologies. His innovative approaches have led to the creation of materials that enhance the quality and durability of photographic images.

Collaborations

Throughout his career, Llewellyn has collaborated with notable colleagues, including John Demita Goddard and David T Clarke. These partnerships have fostered a creative environment that has led to groundbreaking advancements in the field.

Conclusion

Llewellyn J Leyshon is a distinguished inventor whose work in photographic technology continues to impact the industry. His numerous patents and collaborations highlight his commitment to innovation and excellence in this field.

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