EISAI CHEMICAL CO., LTD.
Patent Owner
Stats
- 4 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Dec 07, 1999 most recent publication
Details
- 4 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 46 Total Citation Count
- May 19, 1987 Earliest Filing
- 12 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
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Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
5608092 1,4,4.sub.a 5,8,9.sub.a -hexahydro-1.alpha.,4.alpha.-methanoan-thraquinone derivative(s)Jan 05, 95Mar 04, 97[C07C]
5412124 Preparation process of naphthoquinone derivative and intermediate for the preparation thereofJul 26, 94May 02, 95[C07C]
5216151 Process for producing benzylphthalazinone derivatives and salts thereofNov 29, 91Jun 01, 93[C07D]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5998611 Process for producing cephem compounds in an aqueous mediumExpiredSep 25, 97Dec 07, 99[C07D]
5637716 Processes for the preparation of hydroquinone and benzoquinone derivativesExpiredDec 27, 95Jun 10, 97[C07D]
5565586 Oxidative process for the preparation of allyl quinone derivativesExpiredMar 01, 95Oct 15, 96[C07C]
5428173 Process for the preparation of aminothiadiazolylacetyl halide derivtivesExpiredSep 30, 93Jun 27, 95[C07D]
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