公开(公告)号：DE3430819A1

公开(公告)日：1986-03-06

申请号：DE3430819

申请日：1984-08-22

Applicant: BASF AG

Inventor： HUEBNER WERNER ,  MELZER MILENA ,  KOESTER EBERHARD DR ,  BAUR REINHOLD DR ,  SOMMERMANN FRIEDRICH DR

IPC: G11B5/70 ,  G11B5/702 ,  G11B5/84 ,  G11B5/706 ,  B05D1/26 ,  H01F41/24

公开(公告)号：DE2960015D1

公开(公告)日：1981-01-08

申请号：DE2960015

申请日：1979-01-12

Applicant: BASF AG

Inventor： SCHOETTLE KLAUS ,  DOBLER PETER ,  LEWIN HELMUT ,  KOESTER EBERHARD DR

IPC: B03C1/30 ,  B21C43/00 ,  G11B5/84 ,  G11B23/50 ,  B65H17/00

公开(公告)号：DE3608214A1

公开(公告)日：1987-09-17

申请号：DE3608214

申请日：1986-03-12

Applicant: BASF AG

Inventor： DUST MATTHIAS DR ,  NEUMANN PETER DR ,  SCHEFCZIK ERNST DR ,  BENTHACK-THOMS HEIDI DR ,  BARZYNSKI HELMUT DR ,  SCHOMANN KLAUS DIETER DR ,  KUPPELMAIER HARALD DR ,  KOESTER EBERHARD DR

IPC: B41M5/26 ,  C09B23/00 ,  C09B57/06 ,  G11B7/24 ,  G11B7/244 ,  G11B7/247 ,  G11B7/253 ,  G11B7/2534 ,  G11B7/258 ,  G11B7/2585

Abstract: Naphtholactam dyes of the formula +TR where R1, R2, R3, R4, R5, n, p, Z1, Z2 and the rings A, B, C and D each have the meanings stated in the description, and an optical recording medium which contains one or more naphtholactam dyes and may contain a base.

公开(公告)号：DE3276884D1

公开(公告)日：1987-09-03

申请号：DE3276884

申请日：1982-12-11

Applicant: BASF AG

Inventor： MELZER MILENA ,  SCHNEIDER NORBERT ,  KOPKE HELMUT ,  SCHOETTLE KLAUS ,  KOESTER EBERHARD DR ,  BALZ WERNER DR ,  GRAU WERNER DR

IPC: C08L75/06 ,  C09D5/23 ,  C09D171/00 ,  C09D171/10 ,  C09D175/06 ,  G11B5/70 ,  G11B5/702 ,  G11B5/84 ,  G11B5/842

公开(公告)号：AT16652T

公开(公告)日：1985-12-15

申请号：AT80107895

申请日：1980-12-13

Applicant: BASF AG

Inventor： REIMER KARL-JUERGEN ,  PFEFFERKORN DIETMAR ,  KOESTER EBERHARD DR ,  KREIMES NORBERT ,  ANDRIESSEN WILHELMUS ,  WAGNER WERNER DR ,  WAGNER HERBERT DR CHEM

IPC: G11B23/04

公开(公告)号：DE3168102D1

公开(公告)日：1985-02-21

申请号：DE3168102

申请日：1981-03-10

Applicant: BASF AG

Inventor： KOESTER EBERHARD DR ,  DEIGNER PAUL DR ,  SCHAEFER DIETER DR ,  UHL KARL DR ,  FALK ROLAND DR

IPC: G11B5/84 ,  G11B5/845

Abstract: A device for magnetically orienting the magnetizable particles of magnetic recording media in a preferred direction, which media are obtained by applying a coating of anisotropically magnetic particles finely dispersed in a solution of an organic binder system and conventional additives to a non-magnetic base, and subsequently solidifying the coating, by the action, on the still fluid coating, of the magnetic fields produced by two E-shaped electromagnets arranged symmetrically with respect to, and in mirror-image relationship to, the plane of the said coating.

公开(公告)号：CS228141B2

公开(公告)日：1984-05-14

申请号：CS893480

申请日：1980-12-17

Applicant: BASF AG

Inventor： REIMER KARL JUERGEN ,  PFEFFERKORN DIETMAR ,  KOESTER EBERHARD DR ,  KREIMES NORBERT ,  ANDRIESSEN WILHELMUS ,  WAGNER HERBERT DR ,  WAGNER WERNER

IPC: G11B23/04 ,  G11B23/087

Abstract: A cassette system for any type of recording medium in strip or tape form, such as films and magnetic tapes, consists essentially of a housing whose external dimensions match those of a conventional type of cassette, and a protective holder for the recording medium which is wound into at least one roll. The housing and the holder are separate or separable members and can be fitted together. Both are provided with means for inserting the holder into the housing in the correct position, and for introducing the recording medium into the transport apparatus. The housing is provided with opening and closing means. The holder can be designed to be separable from the roll of recording medium. Preferably, the housing is a precision-made article and the holder a low-cost article.

公开(公告)号：DE2860071D1

公开(公告)日：1980-11-13

申请号：DE2860071

申请日：1978-07-28

Applicant: BASF AG

Inventor： BRODT RUDOLF DR ,  JAKUSCH HELMUT DR ,  KOESTER EBERHARD DR ,  LOESER WERNER DR ,  OHLINGER MANFRED DR ,  SARNECKI WILHELM DR ,  STECK WERNER DR

IPC: C01G49/08 ,  C01G49/06 ,  G11B5/62 ,  G11B5/70 ,  G11B5/706 ,  H01F1/11

Abstract: A process for the manufacture of acicular ferrimagnetic iron oxide by dehydrating acicular iron(III) oxide hydroxides to give acicular iron(III) oxides, then reducing these iron(III) oxides at from 300 DEG to 650 DEG C. by means of an organic compound which decomposes in this temperature range, and oxidizing the reduced product with an oxygen-containing gas at from 200 DEG to 500 DEG C., wherein the acicular iron(III) oxide hydroxides employed consist of a mixture of goethite and lepidocrocite, containing at least 60% of the latter, and the dehydration is carried out at from 250 DEG to 700 DEG C.

公开(公告)号：DE2344644A1

公开(公告)日：1974-05-02

申请号：DE2344644

申请日：1973-09-05

Applicant: BASF AG

Inventor： KOESTER EBERHARD DR ,  WUNSCH GERD DR ,  DEIGNER PAUL DR ,  GRAW DIETER DR ,  KNELLER ECKART PROF DR

IPC: C09D5/23 ,  C09D7/12 ,  G03G5/16 ,  G11B5/02 ,  G11B5/62 ,  G11B5/64 ,  G11B5/70 ,  G11B5/706 ,  G11B23/28

Abstract: The invention relates to a method of recording magnetic signals on magnetic recording media containing an exchange-anisoptropic material at a temperature lower than, equal to or higher than the Neel temperature of this magnetic material. After the recording has been made, the magnetic recording medium is heated to a temperature equal to, or higher than, the Neel temperature, then cooled down to a temperature below the Neel temperature and the recording temperature, following which it is provided with an indicator which betrays re-heating.

公开(公告)号：DE3786476D1

公开(公告)日：1993-08-19

申请号：DE3786476

申请日：1987-03-07

Applicant: BASF AG

Inventor： DUST MATTHIAS DR ,  NEUMANN PETER DR ,  SCHEFCZIK ERNST DR ,  BENTHACK-THOMS HEIDI DR ,  BARZYNSKI HELMUT DR ,  SCHOMANN KLAUS-DIETER DR ,  KUPPELMAIER HARALD DR ,  KOESTER EBERHARD DR

IPC: B41M5/26 ,  C09B23/00 ,  C09B57/06 ,  G11B7/24 ,  G11B7/244 ,  G11B7/247 ,  G11B7/253 ,  G11B7/2534 ,  G11B7/258 ,  G11B7/2585

Abstract: Naphtholactam dyestuffs are (a) symmetrical bis-benz(cd)indole-2 tri- to nona-methin cyanine salts of formula (Ia) (where R1 and R3 = (substd.) 1-20C alkyl, opt. with 0 atoms in the chain, (substd.) 5-7C cycloalkyl or (substd.) phenyl; R2, R4 and R5 = H, (substd.) 1-6C alkyl, (substd.) 5-6C cycloalkyl, (substd.) phenyl, 1-6C alkoxycarbonyl, 1-6C carboxyalkyl, OH, 1-4C alkoxy or halogen; n = 0 or 1; p = 0, 1 or 2; Z1 and Z2 = H or, if n = 1, together may = a 2-3C alkylene chain, opt. substd. by 1-4C alkyl, or one or 2 carbonyl gps.; (-) = an anion; rings A, B, C and D may be substd. or benzo-anellated; excepted cpds. are such that: n and p not both = 0 if rings A, B, C and/or D are unsubstd. or substd. by halogen, 1-4C alkoxy, 1-4C mono- or dialkylamino or NO2, R2 not = H if n = 1, p = 0 and Z1 and Z2 both = H; at least one of R2, R4 and R5 not = H if n = 1, p = 1 and Z1 and Z2 both = H.)