EISAI CHEMICAL CO., LTD.

Patent Owner

Watch Compare Add to Portfolio

Stats

Details

Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
C07C ACYCLIC OR CARBOCYCLIC COMPOUNDS 3135
 
 
 
C07D HETEROCYCLIC COMPOUNDS 1161

Top Patents (by citation)

Upgrade to the Professional Level to View Top Patents for this Owner. Learn More

Recent Publications

  • No Recent Publications to Display

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5686635 Tetrahydro-alkenyl-methanonaphthalene-5,8-dione derivativesJul 26, 96Nov 11, 97[C07C]
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Expired/Abandoned/Withdrawn Patents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]
5874611 Butenyl hydroquinone derivativesExpiredJul 01, 96Feb 23, 99[C07C]
5677471 Process for the preparation of quinone derivativeExpiredJul 26, 96Oct 14, 97[C07C]
5665888 Protected aminothiazolylacetic acid derivativesExpiredMar 28, 95Sep 09, 97[C07D]
5650518 Protected aminothiazolylacetic acid derivativesExpiredJan 25, 96Jul 22, 97[C07D]
5637716 Processes for the preparation of hydroquinone and benzoquinone derivativesExpiredDec 27, 95Jun 10, 97[C07D]
5631378 Protected aminothiazolylacetic acid derivativesExpiredJan 25, 96May 20, 97[C07D]
5565586 Oxidative process for the preparation of allyl quinone derivativesExpiredMar 01, 95Oct 15, 96[C07C]
5547580 Purification method of crude productExpiredMar 22, 95Aug 20, 96[B01D]
5476955 Process for the preparation of a quinone derivativeExpiredMar 01, 94Dec 19, 95[C07C]
5428173 Process for the preparation of aminothiadiazolylacetyl halide derivtivesExpiredSep 30, 93Jun 27, 95[C07D]
4906411 Process for producing 2-methyl-1,4-naphthoquinoneExpiredMay 19, 87Mar 06, 90[C07C]

Top Inventors for This Owner

Upgrade to the Professional Level to View Top Inventors for this Owner. Learn More

We are sorry but your current selection exceeds the maximum number of comparisons () for this membership level. Upgrade to our Level for up to -1 comparisons!

We are sorry but your current selection exceeds the maximum number of portfolios (0) for this membership level. Upgrade to our Level for up to -1 portfolios!.