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Patent applications and USPTO patent grants for Kehoe; John R..The latest application filed is for "neutral sized paper for use in the production of gypsum wallboard".
Patent | Date |
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Neutral sized paper for use in the production of gypsum wallboard Grant 4,853,085 - Johnstone , et al. * August 1, 1 | 1989-08-01 |
Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard Grant 4,548,676 - Johnstone , et al. October 22, 1 | 1985-10-22 |
Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard Grant 4,470,877 - Johnstone , et al. * September 11, 1 | 1984-09-11 |
Paper having mineral filler for use in the production of gypsum wallboard Grant 4,372,814 - Johnstone , et al. February 8, 1 | 1983-02-08 |
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