Llewellyn J. Leyshon

Person

Watford, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Method for developing a high contrast photographic material contain...
- Patent number 6,790,585
- Issue date Sep 14, 2004
- Eastman Kodak Company
- Jacques Roussilhe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic elements containing cyan coupler UV absorber and stabi...
- Patent number 6,756,189
- Issue date Jun 29, 2004
- Eastman Kodak Company
- Danuta Gibson
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
High contrast photographic element containing a polyhydrazide nucle...
- Patent number 6,713,226
- Issue date Mar 30, 2004
- Eastman Kodak Company
- John D. Goddard
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic couplers having improved image dye light stability
- Patent number 6,699,650
- Issue date Mar 2, 2004
- Eastman Kodak Company
- David Clarke
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photographic element with dye-forming coupler and stabilizing compound
- Patent number 6,444,412
- Issue date Sep 3, 2002
- Eastman Kodak Company
- David Clarke
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic element containing cyan dye-forming coupler
- Patent number 6,444,417
- Issue date Sep 3, 2002
- Eastman Kodak Company
- David Clarke
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photographic element with yellow dye-forming coupler and stabilizin...
- Patent number 6,312,881
- Issue date Nov 6, 2001
- Eastman Kodak Company
- Danuta Gibson
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
High contrast photographic element containing a novel nucleator
- Patent number 6,245,480
- Issue date Jun 12, 2001
- Eastman Kodak Company
- Judith A. Bogie
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image dye-forming couplers and photographic elements containing them
- Patent number 6,071,683
- Issue date Jun 6, 2000
- Eastman Kodak Company
- John D. Goddard
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photographic elements containing cyan dye-forming coupler, coupler...
- Patent number 6,004,738
- Issue date Dec 21, 1999
- Eastman Kodak Company
- Philip T. Lau
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color photographic element, compounds and process
- Patent number 5,021,333
- Issue date Jun 4, 1991
- Eastman Kodak Company
- Llewellyn J. Leyshon
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Bisphenol derivative stabilizers
- Patent number 4,782,011
- Issue date Nov 1, 1988
- Eastman Kodak Company
- John D. Goddard
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Substituted pyrazolo[3, 2-c]-s-triazole photographic couplers and p...
- Patent number 4,777,121
- Issue date Oct 11, 1988
- Eastman Kodak Company
- Paul R. Buckland
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Heterocyclic phosphorus compound stabilizers
- Patent number 4,749,645
- Issue date Jun 7, 1988
- Eastman Kodak Company
- John D. Goddard
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Method for developing a high contrast photographic material contain...
- Publication number 20040023149
- Publication date Feb 5, 2004
- Jacques Roussilhe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
HIGH CONTRAST PHOTOGRAPHIC ELEMENT CONTAINING A POLYHYDRAZIDE NUCLE...
- Publication number 20040005511
- Publication date Jan 8, 2004
- Eastman Kodak Company
- John D. Goddard
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Photographic element containing cyan dye-forming coupler
- Publication number 20020064735
- Publication date May 30, 2002
- Eastman Kodak Company
- David Clarke
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Photographic element with dye-forming coupler and stabilizing compound
- Publication number 20020058212
- Publication date May 16, 2002
- Eastman Kodak Company
- David Clarke
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Llewellyn J. Leyshon

Person

Patents Grantslast 30 patents

Method for developing a high contrast photographic material contain...

Photographic elements containing cyan coupler UV absorber and stabi...

High contrast photographic element containing a polyhydrazide nucle...

Photographic couplers having improved image dye light stability

Photographic element with dye-forming coupler and stabilizing compound

Photographic element containing cyan dye-forming coupler

Photographic element with yellow dye-forming coupler and stabilizin...

High contrast photographic element containing a novel nucleator

Image dye-forming couplers and photographic elements containing them

Photographic elements containing cyan dye-forming coupler, coupler...

Color photographic element, compounds and process

Bisphenol derivative stabilizers

Substituted pyrazolo[3, 2-c]-s-triazole photographic couplers and p...

Heterocyclic phosphorus compound stabilizers

Patents Applicationslast 30 patents

Method for developing a high contrast photographic material contain...

HIGH CONTRAST PHOTOGRAPHIC ELEMENT CONTAINING A POLYHYDRAZIDE NUCLE...

Photographic element containing cyan dye-forming coupler

Photographic element with dye-forming coupler and stabilizing compound