Snia Viscosa Societa' Nazionale Industria Applicazioni Viscosa SpA

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4791228 Process for preparing .alpha.,.omega.-dicarboxylic acidsExpiredFeb 12, 85Dec 13, 88[C07C]
4668241 Method of dyeing polycapronamide textile articles using two acid dye combinations with different dyeing kineticsExpiredApr 17, 85May 26, 87[D06P]
4613694 Preparation of unsaturated or saturated .alpha., .omega.-dialdehydes and .alpha., .omega.-diacidsExpiredSep 30, 80Sep 23, 86[C07C]
4515908 Liquid foams of reinforced unsaturated polyester resins and process for making the sameExpiredApr 02, 84May 07, 85[C08J]
4491528 Esters of polyvalent alcohols, process for preparing them and their use as lubricating oilsExpiredJul 15, 83Jan 01, 85[C10M]
4471699 Projectiles for smooth bore shooting gunsExpiredMar 28, 83Sep 18, 84[F42B]
4461850 Process for obtaining cellular materials based on unsaturated polyester resinsExpiredJul 09, 81Jul 24, 84[B29D]
4444832 Process for obtaining reinforced cellular materials based on unsaturated polyester resinsExpiredMay 20, 82Apr 24, 84[B29D]
4443596 Viscose rayon filment yarn and process for producing sameExpiredSep 14, 82Apr 17, 84[C08B]
4419318 Process for forming projectiles for smooth bore shooting gunsExpiredOct 20, 80Dec 06, 83[B29C, B29D]
4418016 Method for recovering omega-amino-dodecanoic acid from crystallization mother liquorsExpiredAug 14, 81Nov 29, 83[C09F, C11C]
4404157 Process for the continuous production of viscose rayon yarns having high degree of whitenessExpiredJun 17, 81Sep 13, 83[D01F]
4399292 Process for purifying oxygen containing recycle gas deriving from ozonizationExpiredJun 28, 79Aug 16, 83[C07D, C07C, B01D]
4383962 Process for producing viscose rayon filament yarnExpiredSep 17, 80May 17, 83[D01F]
4381186 Process for dyeing polyamidic textile materials, in particular high dyeing speed polyamides with acid dyes and alkaline reactantsExpiredMar 18, 81Apr 26, 83[D06P]
4376680 Process for demonomerizing polycapronamideExpiredDec 10, 79Mar 15, 83[B01D]
4371491 Process for the continuous spinning of viscose rayonExpiredJan 09, 81Feb 01, 83[D01F]
4370425 Process for obtaining permanently self-extinguishing cellular materials which have a low density and high mechanical characteristicsExpiredNov 05, 80Jan 25, 83[C08V, C08L]
4361532 Process for the continuous spinning of viscose rayonExpiredJan 09, 81Nov 30, 82[D01F]
4349473 Process for the preparation of .omega.-lactams, in particular caprolactamExpiredOct 21, 80Sep 14, 82[C07D]

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