Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5106600 | Process for producing tabular acicular gypsum crystals | John C. Gaynor, Robert Erickson | 1992-04-21 |
| 4853085 | Neutral sized paper for use in the production of gypsum wallboard | John Kehoe | 1989-08-01 |
| 4801355 | Tabular acicular gypsum and method of filling paper | John C. Gaynor, Robert Erickson | 1989-01-31 |
| 4548676 | Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard | John Kehoe | 1985-10-22 |
| 4470877 | Paper having calcium sulfate mineral filler for use in the production of gypsum wallboard | John Kehoe | 1984-09-11 |
| 4372814 | Paper having mineral filler for use in the production of gypsum wallboard | John Kehoe | 1983-02-08 |