Inventor

Klaus D. Schomann

Inventor

Ludwigshafen, DE

Overview

1980–1998

Patent span

Physics

Primary field (CPC G)

Patents· 24 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer26%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests23%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments22%

C07CAcyclic or carbocyclic compounds9%

Y10TTechnical subjects covered by former us classification8%

H05FStatic electricity5%

G03CPhotosensitive materials for photographic purposes3%

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

B82YSpecific uses or applications of nanostructures2%

PatentTitleYear

5,728,867'Carbonyloxy-substituted azulenesquaric acid dyes, intermediates therefor and optical recording medium'1998 5,462,810'Magnetic recording medium'1995 5,235,573'Repositioning laser beams in information storage media'1993 5,221,751'Heterocyclic polymethine dyes with carbamate or amide groups'1993 5,169,975'Binary azulenesquaric acid dyes, their intermediates and optical recording medium'1992 5,124,240'Optical recording medium'1992 5,122,435'Amido-containing azulene squaric acid dyes, intermediates therefor and optical recording medium'1992 5,093,492'Methine dyes and optical recording medium containing same'1992 5,087,727'A zulenes containing a urethane group'1992 5,084,592'Azulenesquaric acid dyes, azulene intermediates therefor, and optical recording medium'1992 5,064,702'Quinoxalinepentamethine dyes and optical recording medium containing same'1991 5,002,863'Naphtholactamtrimethine dyes and optical recording medium containing same'1991 4,990,649'Azulenesquaric acid dyes that contain urethane groups'1991 4,966,798'Optical recording medium'1990 4,939,012'Naphtholactam dyes and optical recording medium containing these dyes'1990 4,876,356'Naphtholactam dyes and optical recording medium containing these days'1989 4,830,951'Naphtholactamsquaric acid dyes and optical recording materials containing these dyes'1989 4,806,664'Novel tetraphenyldithiolene complexes, asymmetrically substituted benzoins, and optical recording materials containing the novel complexes'1989 4,751,601'Tape guide system for magnetic tapes, especially video tapes'1988 4,712,148'Magnetic tape cassette with equalization of electrostatic charges'1987 4,670,332'Irreversible optical medium for information storage, and its production'1987 4,625,252'Guide system and magnetic tape cassette comprising such a system'1986 4,348,698'Magnetic devices for changing video recordings'1982 4,187,521'DC erase head'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1998Patents assigned to BASF AG (22)· patent assignee history

1980Based in Frankfurt am Main, DE· patent location history

1982–1998Based in Ludwigshafen, DE· patent location history

1992Patents assigned to ALBERT BERNHARD (1)· patent assignee history

1992Patents assigned to BROSIUS SIBYLLE (1)· patent assignee history

1992Patents assigned to HARTEN ULRICH (1)· patent assignee history

1995Patents assigned to BASF MAGNETICS GMBH (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BASF AG	22	1980–1998
ALBERT BERNHARD	1	1992
BASF MAGNETICS GMBH	1	1995
BROSIUS SIBYLLE	1	1992
HARTEN ULRICH	1	1992

Locations

Location	Patents	Span
Ludwigshafen, DE	23	1982–1998
Frankfurt am Main, DE	1	1980