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Patent applications and USPTO patent grants for Scharf; Emil.The latest application filed is for "preparation of n-(2-hydroxyethyl)-piperazine".
Patent | Date |
---|---|
Preparation of N-(2-hydroxyethyl)-piperazine Grant 5,455,352 - Huellmann , et al. October 3, 1 | 1995-10-03 |
Process and apparatus for preparing or reacting alkanolamines Grant 4,567,303 - Boettger , et al. January 28, 1 | 1986-01-28 |
Preparation of water-soluble, nitrogen-containing condensates and their use in papermaking Grant 4,450,045 - Hertel , et al. May 22, 1 | 1984-05-22 |
Water soluble crosslinked ethyleneimine grafted polyamidoamine Grant 4,371,674 - Hertel , et al. February 1, 1 | 1983-02-01 |
Incorporating a crosslinked polyamidoamine condensation product into paper-making pulp Grant 4,144,123 - Scharf , et al. March 13, 1 | 1979-03-13 |
Nitrogenous condensation products used as retention aids in papermaking Grant 4,066,494 - Scharf , et al. January 3, 1 | 1978-01-03 |
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