Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6799124 | Method of optimizing risk informed inspections of heat exchangers | Robert K. Perdue, Kenneth R. Balkey, Philip J. Kotwicki | 2004-09-28 |
| 5752317 | Method of restricting transverse displacement of a nuclear heat exchanger tube support plate | Thomas A. Pitterle, Warren R. Junker, William K. Cullen | 1998-05-19 |
| 5456290 | Tube plug having a flange sealing a chamber for plugging a tubular member | Eric R. Haberman, James W. Everett, David A. Snyder | 1995-10-10 |
| 5438862 | System and method for in situ testing of the leak-tightness of a tubular member | David A. Snyder | 1995-08-08 |
| 5423351 | Fastener for tube plug | — | 1995-06-13 |
| 5255717 | System for removing a plug from a heat exchanger tube | Lawrence A. Nelson, George D. Fulmer, George G. Elder | 1993-10-26 |
| 5249604 | Tube plug for plugging a tube | — | 1993-10-05 |
| 5027507 | Method for controlling leakage through degraded heat exchanger tubes in the tubesheet region of a nuclear generator | Lawrence A. Nelson | 1991-07-02 |
| 4829660 | System for removing a plug from a heat exchanger tube | James W. Everett, John B. Gunter, William Woolfolk, Frank Sadofsky, Lawrence A. Nelson +2 more | 1989-05-16 |
| 4771810 | Multi-seal mechanical tube plug | Leonard F. Ermold, Lawrence A. Nelson | 1988-09-20 |
| 4765374 | Multi-seal mechanical tube plug | Leonard F. Ermold, Lawrence A. Nelson | 1988-08-23 |
| 4751944 | Duplex mechanical tube plug | Susanta Sinha, Lawrence A. Nelson | 1988-06-21 |