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LT - Ksantinų, kuriose beveik nėra fluorescuojančių priemaišų, gavimo būdas
EN - METHOD FOR THE PREPARATION OF XANTYNES NEARLY FREE FROM FLUORESCENT IMPURITY

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Patent expired

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Patent application specification | Search report | Patent specification (0.25 Mb)
Bibliographic data
Indications of the International Patent Classification (IPC)
(51) INT.CL.: (2006.01) C07D 473/00
Patent
(11) Number of the document 3772
(13) Kind of document B
(21) Application number IP1463
(22) Date of filing the application 1993-11-12
(41) Date of publication of the application 1995-05-25
(45) Date of publication of patent 1996-03-25
Priority applications
(30) Number Date Country code
40 04 618.4 1990-02-15 DE
4894528 1991-02-14 SU
Applicant
(71) HOECHST AKTIENGESELLSCHAFT, D-65926 Frankfurt am Main, DE
Inventors
(72) Rudolf KNIEPS, DE
Ottmar JAENICKE, DE
Walter SCHOENFELD, DE
Grantee
(73) Sanofi-Aventis Deutschland GmbH, Brueningstrasse 50, 65929 Frankfurt am Main, DE
Attorney or representative
(74) Reda ŽABOLIENĖ, METIDA, Verslo centras "VERTAS", Gynėjų g. 16, LT-01109 Vilnius, LT
Title
(54) METHOD FOR THE PREPARATION OF XANTYNES NEARLY FREE FROM FLUORESCENT IMPURITY
Last renewal fee
Payment date Validity (years) Amount
2012-10-24 20 1200.00 LTL
Legal status
Patent expired
Invalidation date 2013-11-12
Last update date 2021-10-22