Inventor

Walter F. De Winter

Inventor

Gravenwezel, BE

Overview

32→

Patents

1976–1992

Patent span

Physics

Primary field (CPC G)

Patents· 32 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary

G03GElectrography25%

G03CPhotosensitive materials for photographic purposes23%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%

C08JWorking-up9%

Y10TTechnical subjects covered by former us classification9%

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds7%

C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds6%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices3%

C07DHeterocyclic compounds1%

PatentTitleYear

5,093,445'Bead polymers containing fluorine'1992 4,663,265'Liquid electrophoretic developer composition'1987 4,639,403'Electrostatographic suspension developer and a process for its preparation comprising quaternary ionic copolymer for positive toner charge'1987 4,639,404'Liquid developer for development of electrostatic images'1987 4,631,243'Electrostatographic suspension developer and a process for the production thereof'1986 4,606,989'Liquid developer for development of electrostatic images'1986 4,564,574'Liquid developer for development of electrostatic images'1986 4,525,446'Liquid developer for development of electrostatic images comprising onium salt polymer and an anion'1985 4,522,908'Liquid electrophoretic developer'1985 4,478,907'Aqueous copolyester dispersions suited for the subbing of polyester film'1984 4,340,664'Copolymer latex and photographic silver halide materials containing such latex'1982 4,266,044'Novel polymeric mordanting agents for anionic compounds'1981 4,259,429'Protection of toner images'1981 4,255,513'Photopolymerizable recording materials'1981 4,245,036'Emulsifier-free latexes and photographic light-sensitive elements containing them'1981 4,241,159'Electrophotographic liquid developer comprising acrylic or methacrylic acid ester of hydrogenated abietyl alcohol polymer'1980 4,215,196'Photographic elements in which gelatin silver halide layers contain polymers with semicarbazone or alkoxy carbonyl hydrazone groups'1980 4,202,697'Production of etch-resist colloid and material suitable therefor'1980 4,145,220'Silver halide element with polymeric mordanting agents for anionic compounds'1979 4,139,768'Imaging chamber with electrode structure'1979 4,130,670'Process for fixing toner images'1978 4,123,374'Electrophoretic development'1978 4,075,023'Polymerizable unsaturated oxazolidines and tetrahydro-1,3-oxazines and polymers thereof'1978 4,047,957'Process of hardening protein-containing photographic layers with a mixture of a carboxyl group-activating, low molecular weight compound and a carboxyl group-activating polymer'1977 4,039,463'Electrostatographic developers comprising a carrier bead coated with a copolymer of N-vinylcarbazole and trialkoxyvinylsilane and/or triacetoxyvinylsilane'1977 4,033,770'Production of adhesive transfers by diffusion transfer'1977 4,022,622'Dispersing polymeric particles in aqueous medium for coating silver halide emulsion layers'1977 3,993,850'Recording material'1976 3,986,877'Development promoting compounds for silver halide photography'1976 3,969,283'Recording material'1976 3,950,169'Electrophotographic element with polymeric conductive layer'1976 3,941,727'Hydrophilic aqueous coating composition containing aqueous binder solution and select homogeneous aqueous dispersion of polymer particles'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1987Patents assigned to AGFA GEVAERT NV (29)· patent assignee history

1976–1978Based in Berchem, BE· patent location history

1977–1992Based in Gravenwezel, BE· patent location history

1979–1981Based in Mortsel, BE· patent location history

1981Based in Pont-a-Celles, BE· patent location history

1986–1992Patents assigned to AGFA GEVAERT AG (3)· patent assignee history

1986–1987Based in Grafenwezen, BE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AGFA GEVAERT NV	29	1976–1987
AGFA GEVAERT AG	3	1986–1992

Locations

Location	Patents	Span
Gravenwezel, BE	19	1977–1992
Berchem, BE	7	1976–1978
Grafenwezen, BE	2	1986–1987
Mortsel, BE	2	1979–1981
Pont-a-Celles, BE	1	1981