Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4548732 | Process for acidizing hot siliceous material | Seth Silverman | 1985-10-22 |
| RE30935 | Method of starting gas production by injecting nitrogen-generating liquid | Edwin A. Richardson | 1982-05-18 |
| 4289633 | Chemical process for backsurging fluid through well casing perforations | Edwin A. Richardson, David C. Berkshire | 1981-09-15 |
| 4232741 | Temporarily plugging a subterranean reservoir with a self-foaming aqueous solution | Edwin A. Richardson, David C. Berkshire, Joseph Reisberg, James H. Lybarger | 1980-11-11 |
| 4219083 | Chemical process for backsurging fluid through well casing perforations | Edwin A. Richardson, David C. Berkshire | 1980-08-26 |