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Inventor

Karl-Heinz Wieser

Inventor
Leverkusen, DE

Overview

3→
Patents
1986–1990
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 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. pigments30%
C09DCoating compositions, e.g. paints, varnishes or lacquers20%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds10%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds10%
C08JWorking-up10%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties10%
C09KMaterials for miscellaneous applications, not provided for elsewhere10%
PatentTitleYear
4,929,705'New polyisocyanate-polyaddition compounds, a process for their preparation and their use for the dispersion of solids'19904,909,853'Pigment preparations'19904,576,649'Color enhanced permanent pigments from precipitated cationic dyes'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986Patents assigned to MOBAY CHEMICAL CORP (1)· patent assignee history
1986Based in Wayne, NJ, US· patent location history
1990Patents assigned to BAYER AG (2)· patent assignee history
1990Based in Leverkusen, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAYER AG21990
MOBAY CHEMICAL CORP11986
Locations
LocationPatentsSpan
Leverkusen, DE21990
Wayne, New Jersey, US11986