DIAMOND SHAMROCK CORPORATION CHANGED TO DIAMOND CHEMICALS COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4517068 Electrocatalytic electrodeExpiredAug 26, 83May 14, 85[C25B]
4474053 Storage or disposal cavern leak detection and loss preventionExpiredAug 25, 82Oct 02, 84[G01M]
4459324 Electrode coating with platinum-group metal catalyst and semi-conducting polymerExpiredApr 08, 82Jul 10, 84[B05D]
4444642 Dimensionally stable coated electrode for electrolytic process, comprising protective oxide interface on valve metal base, and process for its manufactureExpiredAug 17, 81Apr 24, 84[C25B]
4443445 Imidazo- and pyrimido-1,3,5-thiadiazin-4-onesExpiredSep 01, 82Apr 17, 84[A01N, C07D]
4441896 Process for recovering organic substances from spent air vaporsExpiredSep 13, 82Apr 10, 84[B01D]
4436523 Process for the preparation of storage stable colorant compositions by ultrafiltration and wet millingExpiredSep 20, 82Mar 13, 84[C09B, D06P]
4435313 Electrode with outer coating for effecting an electrolytic process and protective intermediate coating on a conductive base, and method of making sameExpiredAug 17, 81Mar 06, 84[C25B]
4425217 Anode with lead base and method of making sameExpiredAug 17, 81Jan 10, 84[C25B]
4397729 Cermet anode electrowining metals from fused saltsExpiredSep 03, 81Aug 09, 83[C25C]
4354875 Controlling the curing time of alkali metal silicates using derivatives of glyoxalExpiredOct 30, 81Oct 19, 82[C09J]
4331528 Coated metal electrode with improved barrier layerExpiredOct 06, 80May 25, 82[C25B]
4221644 Air-depolarized chlor-alkali cell operation methodsExpiredAug 14, 79Sep 09, 80[C25F]
4202738 Electrolytic generation of halogen biocidesExpiredMay 12, 78May 13, 80[C02C, C25B]

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