Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872918 | Heterocyclic esters and smoking compositions containing a heterocyclic ester flavorant-release additive | Kenneth F. Podraza | 1989-10-10 |
| 4859775 | Process for preparing acylpyrazine ethers | David L. Williams, Everett W. Southwick | 1989-08-22 |