National Research Corp
National RActive Patents
0
Total Holdings
13
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3363830A | Diffusion pump | Expired / Lapsed | 1967-02-16 | 1968-01-16 | 0 | Details |
| US3326176A | Work-registration device including ionic beam probe | Expired / Lapsed | 1964-10-27 | 1967-06-20 | 2 | Details |
| US3262187A | Method of making superconductive wires | Expired / Lapsed | 1963-09-25 | 1966-07-26 | 4 | Details |
| US3165255A | High vacuum device | Expired / Lapsed | 1962-06-11 | 1965-01-12 | 2 | Details |
| US3043728A | Apparatus and process for metallic vapor coating | Expired / Lapsed | 1958-03-17 | 1962-07-10 | 0 | Details |
| US3009098A | Electrical apparatus for analyzing gases | Expired / Lapsed | 1958-08-15 | 1961-11-14 | 0 | Details |
| US2936107A | High vacuum device | Expired / Lapsed | 1956-06-14 | 1960-05-10 | 0 | Details |
| US2890878A | Apparatus for annealing in a high vacuum | Expired / Lapsed | 1956-12-28 | 1959-06-16 | 2 | Details |
| US2824488A | Apparatus for grading fibers | Expired / Lapsed | 1954-08-25 | 1958-02-25 | 0 | Details |
| US2665227A | Apparatus and method of coating by vapor deposition | Expired / Lapsed | 1950-06-30 | 1954-01-05 | 1 | Details |
| US2665224A | Process for vapor coating | Expired / Lapsed | 1950-03-07 | 1954-01-05 | 2 | Details |
| US2406682A | Desiccation method and apparatus | Expired / Lapsed | 1944-03-09 | 1946-08-27 | 0 | Details |
| US2386299A | Diffusion pump | Expired / Lapsed | 1944-07-03 | 1945-10-09 | 0 | Details |