Inventor

Hubertus Psaar

Inventor

Leverkusen, DE

Overview

30→

Patents

1976–1992

Patent span

Chemistry

Primary field (CPC C)

Patents· 30 as inventor

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

C09Bprimary

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments32%

B41MPrinting, duplicating, marking, or copying processes23%

C07DHeterocyclic compounds13%

D06PDyeing or printing textiles11%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

G03GElectrography5%

C09DCoating compositions, e.g. paints, varnishes or lacquers4%

C07CAcyclic or carbocyclic compounds2%

G03CPhotosensitive materials for photographic purposes2%

Y10TTechnical subjects covered by former us classification2%

PatentTitleYear

5,134,113'Thermoreactive recording material'1992 5,130,442'Chromogenic enamine compounds, their preparation and use as color formers'1992 5,118,814'Tetraindolyl-heptamethine derivatives'1992 5,094,688'Triarylmethane color-forming agents'1992 4,931,567'Bis(indolyl)ethylene compounds'1990 4,923,641'Highly concentrated stable solutions of color-forming agent: for pressure-sensitive recording materials'1990 4,918,048'Thermoreactive recording material'1990 4,902,806'Bis(indolyl)ethylene aldehydes'1990 4,897,223'Tri-phenyl methyl color-forming agents'1990 4,897,494'Bis(indolyl)ethylene process'1990 4,869,989'Dry toners containing fanal pigments based on cationic dyes'1989 4,849,306'Dry toners containing methinefanal pigments'1989 4,847,177'Fanal pigments of closed-ring dry toners containing indamine-and diphenylmethane dyestuffs'1989 4,808,719'1H-imidazo[2,3-a]indol-2-ones as color-forming agents'1989 4,783,196'Highly concentrated stable solutions of color-forming agents: for pressure-sensitive recording materials'1988 4,600,930'Recording material which reacts under the influence of heat, its preparation and the use of acid-modified polymers as acceptors in this recording material'1986 4,458,009'Process for the production of color photographic images and photographic recording materials'1984 4,211,436'Pressure-sensitive recording material'1980 4,201,707'Methine dyestuffs containing a phenyl azo group'1980 4,145,537'Cationic dyestuffs'1979 4,143,228'Pyrazolinyl indolium dyestuffs'1979 4,138,570'Indoline linked to 2-pyrazoline'1979 4,125,717'Process for the preparation of oxazine dyestuffs'1978 4,087,241'Printing inks for transfer printing'1978 4,083,680'Printing inks for transfer printing'1978 4,017,484'Cationic dyestuffs'1977 4,007,172'Dyestuff including pyrimido-indole moiety'1977 3,999,939'Transfer printing process'1976 3,992,140'Printing inks for transfer printing'1976 3,972,879'Process for isolating easily soluble basic oxazine dyestuffs and phenazine dyestuffs'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1992Patents assigned to BAYER AG (29)· patent assignee history

1976–1992Based in Leverkusen, DE· patent location history

1984Patents assigned to AGFA GEVAERT AG (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAYER AG	29	1976–1992
AGFA GEVAERT AG	1	1984

Locations

Location	Patents	Span
Leverkusen, DE	30	1976–1992