Process Evaluation and Development Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4889591 Crotalaria juncea paper pulpsExpiredMay 27, 88Dec 26, 89[D21B]
4857145 Process for making a pulp from bambooExpiredJul 13, 87Aug 15, 89[D21C]
4699691 Thermomechanical digestion processExpiredSep 04, 85Oct 13, 87[D21C]
4689117 Thermomechanical digestion process for enhancing the brightness of cellulose pulp using bleachantsExpiredSep 04, 85Aug 25, 87[D21C]
4641792 Fiber depitherExpiredOct 22, 84Feb 10, 87[B02C]
4635322 Fiber washerExpiredOct 22, 84Jan 13, 87[D01B]
4347101 Process for producing newsprintExpiredNov 24, 80Aug 31, 82[D21C]
4237582 Bagasse preparationExpiredAug 28, 78Dec 09, 80[D01B]
4231136 Bagasse depithingExpiredAug 28, 78Nov 04, 80[D01B]
4199399 Method for preparing bagasse dissolving pulps and producing rayon having a degree of polymerization of at least 800 therefromExpiredOct 25, 78Apr 22, 80[D01C]

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