Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6430249 | Polymer dispersants and methods of use in a nuclear steam generator | Phillip M. Egerbrecht, Joseph D. Bates, James D. Haff, Ralph L. Minnis | 2002-08-06 |
| 6228950 | Polymer dispersants and methods of use in a nuclear steam generator | Phillip M. Egerbrecht, Joseph D. Bates, James D. Haff, Ralph L. Minnis | 2001-05-08 |
| 5977287 | Treatment of aqueous systems using a chemically modified tannin | David B. Mitchell, Ralph L. Minnis, Thomas Peter Curran, Steven M Deboo, Rashmi Patwardhan +1 more | 1999-11-02 |
| 5864596 | Polymer dispersants and methods of use in a nuclear steam generator | Phillip M. Egerbrecht, Joseph D. Bates, James D. Haff, Ralph L. Minnis | 1999-01-26 |
| 5843337 | Treatment of aqueous systems using a chemically modified tannin | David B. Mitchell, Ralph L. Minnis, Thomas Peter Curran, Steven M Deboo, Rashmi Patwardhan +1 more | 1998-12-01 |
| 5830315 | Treatment of Aqueous systems using a chemically modified tannin | David B. Mitchell, Ralph L. Minnis, Thomas Peter Curran, Steven M Deboo, Rashmi Patwardhan +1 more | 1998-11-03 |
| 5242602 | Spectrophotometric monitoring of multiple water treatment performance indicators using chemometrics | John Richardson, Larry M. Kye, Mark D. Brickhouse, Gary G. Engstrom, Kenneth J. Schlager +1 more | 1993-09-07 |
| 5183574 | Method of dispersing iron | Chih M. Hwa, Wun Ten Tai, Lai-Duien Grace Fan, Robert P. Kreh, Brian Greaves | 1993-02-02 |
| 5167866 | Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides | Chih M. Hwa, Janet Neton, Patricia Scanlon, Roger R. Gaudette | 1992-12-01 |
| 5096595 | Control of scale in aqueous systems using certain phosphonomethyl amine oxides | Chih M. Hwa, Janet Neton, Patricia Scanlon, Roger R. Gaudette | 1992-03-17 |
| 5069798 | Control of scale in aqueous systems using certain phosphonomethyl amines | Chih M. Hwa, Janet Neton, Patricia Scanlon, Roger R. Gaudette | 1991-12-03 |
| 5051532 | N,N-bis-phosphonomethyl taurine N-oxide and water-soluble salts thereof | Chih M. Hwa, Janet Neton, Patricia Scanlon, Roger R. Gaudette | 1991-09-24 |
| 5022926 | Corrosion control | Robert P. Kreh, Joseph T. Lundquist, Wayne L. Henry, Vincent Kuhn | 1991-06-11 |
| 5019343 | Control of corrosion in aqueous systems using certain phosphonomethyl amines | Chih M. Hwa, Janet Neton, Patricia Scanlon, Roger R. Gaudette | 1991-05-28 |
| 4977292 | 4-phosphonomethyl-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane N-oxide and water-soluble salts thereof | Chih M. Hwa, Mita Adhya | 1990-12-11 |
| 4973744 | Ethoxylated N,N-bis-phosphonomethyl 2-(hydroxy)ethylamine N-oxides and water-soluble salts thereof | Chih M. Hwa, Mita Adhya | 1990-11-27 |
| 4968438 | Gallic acid as an oxygen scavenger | Cynthia A. Soderquist, Frederick S. Mandel | 1990-11-06 |
| 4680124 | Polyacrylate scale inhibition | Paul R. Young, Mary E. Koutek | 1987-07-14 |
| 4657785 | Use of benzo and tolyltriazole as copper corrosion inhibitors for boiler condensate systems | David A. Grattan, Alfred W. Oberhofer | 1987-04-14 |
| 4545920 | Boiler water treating compositions | Walter F. Lorenc, Frederick S. Mandel | 1985-10-08 |
| 4457847 | Carboxylate polymers for internal scale control agents in boiler systems | Walter F. Lorenc, Frederick S. Mandel | 1984-07-03 |
| 4419327 | Method of scavenging dissolved oxygen in steam generating equipment using ammonia or amine neutralized erythorbic acid | Cynthia A. Soderquist | 1983-12-06 |