Luigi Stoppani S.p.A.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6596064 Biocidal-antifouling agents with low ecotoxicity indexExpiredDec 26, 01Jul 22, 03[A01N, C09D]
6488924 Vitamin K adduct, particularly suitable as vitamin supplement for feedsExpiredJun 12, 00Dec 03, 02[A61K]
6228244 Chromium plating from baths catalyzed with alkanedisulfonic-alkanesulfonic compounds with inhibitors such as aminealkanesulfonic and heterocyclic basesExpiredDec 18, 98May 08, 01[C25D]
5374408 Process for the preparation of alkaline chromates from chromium mineralsExpiredOct 22, 92Dec 20, 94[C01G]
5112583 Process for recovering chromic anhydride from exhausted aqueous chromium plating bath solutions with exploitation of the recovered chromiumExpiredNov 07, 90May 12, 92[C25B, C01G, C02F]
5110360 Product capable of inhibiting the corrosion of the reinforcements present in concrete or cement mortar and related processExpiredJan 04, 91May 05, 92[C04B, E04C, C23F]
5037620 Preparation of anhydrous sodium dichromate flakesExpiredJan 28, 88Aug 06, 91[B01J]
4759922 Anhydrous sodium dichromate in flakes; process and apparatus for its preparation on an industrial scaleExpiredOct 16, 85Jul 26, 88[C01G]
4577019 Stabilized adducts of menadione bisulfite with p-aminobenzoic acid or adenineExpiredAug 02, 83Mar 18, 86[C07D, C07C]
4568745 Adduct of mutually stabilizing menadione and thiamineExpiredJun 22, 83Feb 04, 86[A61K, C07D]
4560546 Chromium hydroxide precipitate obtained by a continuous process for the removal of chromium from waste watersExpiredApr 13, 83Dec 24, 85[C02F]
4497634 Tanning material containing basic chromic sulfate and mercaptoacetic acidExpiredJun 09, 83Feb 05, 85[C14C]
4419515 Two stage process for preparing 2,6-pyridinedicarboxylic acidExpiredJul 13, 81Dec 06, 83[C07F, C07D]
4401573 Continuous process for the removal of chromium from waste waters and valorization of the recovered chromiumExpiredMay 08, 81Aug 30, 83[C02F]
4237301 Two stage process for preparing 2,6-pyridin-dicarboxylic acidExpiredNov 30, 78Dec 02, 80[C07D]
4217457 Highly selective oxidizing process for preparing pyridin-carboxylic acidsExpiredJul 14, 78Aug 12, 80[C07D, C07B]

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