National Gypsum Co
National GActive Patents
0
Total Holdings
9
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4590733A | Curtain wall panel and method | Expired / Lapsed | 1985-05-28 | 1986-05-27 | 4 | Details |
| US3671061A | Gypsum board fastener | Expired / Lapsed | 1970-07-02 | 1972-06-20 | 3 | Details |
| US3323262A | Z-bar frame assembly | Expired / Lapsed | 1964-12-10 | 1967-06-06 | 2 | Details |
| US3249486A | Method and apparatus for producing foamed synthetic resins | Expired / Lapsed | 1962-06-29 | 1966-05-03 | 2 | Details |
| US3188773A | Wall construction | Expired / Lapsed | 1960-08-24 | 1965-06-15 | 1 | Details |
| US2699879A | Industrial lift truck with clamp attachment | Expired / Lapsed | 1949-11-05 | 1955-01-18 | 0 | Details |
| US2675841A | Drill | Expired / Lapsed | 1951-07-28 | 1954-04-20 | 0 | Details |
| US2228158A | Casein vehicle and method of making same | Expired / Lapsed | 1937-08-28 | 1941-01-07 | 0 | Details |
| US2070150A | Building construction | Expired / Lapsed | 1933-03-30 | 1937-02-09 | 0 | Details |