Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5393439 | Periodate fracturing fluid viscosity breakers | Lewis R. Norman | 1995-02-28 |
| 5373901 | Encapsulated breakers and method for use in treating subterranean formations | Lewis R. Norman | 1994-12-20 |