Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647676 | Process for the isolation of 2,2-dimethyl-7-hydroxy-coumaran | Manfred Lenthe, Gerhard Buttner, Karl-Friedrich Christmann | 1987-03-03 |
| 4486611 | Isolation of dihydroxybenzene-monoethers from reaction mixtures | Manfred Lenthe, Gerhard Buttner, Karl-Friedrich Christmann | 1984-12-04 |
| 4383126 | Preparation of monoalkyl ethers of hydroxyphenols | Gerhard Buttner, Artur Judat, Manfred Lenthe | 1983-05-10 |
| 4321204 | Preparation of certain 2-methyl-2,3-dihydro-benzofuran-7-ols | Gerhard Buttner, Karl-Friedrich Christmann, Manfred Lenthe | 1982-03-23 |