Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8350176 | Method of forming, inserting and permanently bonding ribs in boiler tubes | Walter R. Mohn, George B. Watson, John Hainsworth, Douglas D. Zeigler | 2013-01-08 |
| 6503340 | Method for producing chromium carbide coatings | Michael Gold, Douglas D. Zeigler, George H. Harth, III, Dale F. LaCount, Steven C. Kung +1 more | 2003-01-07 |
| 6387194 | Process and composition for chromizing 400-series stainless steels | Douglas D. Zeigler, George H. Harth, III, Walter R. Mohn | 2002-05-14 |
| 5912050 | Method for chromizing small parts | Douglas D. Zeigler, Walter R. Mohn | 1999-06-15 |
| 5582212 | Continuously slitted roll-on tube shield | — | 1996-12-10 |
| 5547768 | Corrosion resistant nickel oxide surface coating | Mark J. Topolski | 1996-08-20 |
| 5344502 | Surface hardened 300 series stainless steel | William C. Mack, Mark J. Topolski | 1994-09-06 |
| 5309848 | Reversible, wear-resistant ash screw cooler section | Kenneth L. Santelmann, Avelino G. Bolumen, Roger A. Clocker, Thomas Garabedian, Donald C. Housley +1 more | 1994-05-10 |
| 5271550 | Chemical conversion plug to achieve gas tightness | John Hainsworth | 1993-12-21 |