Hartford Empire Co
Hartford EActive Patents
0
Total Holdings
18
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2483458A | Spout sealing machine | Expired / Lapsed | 1945-07-17 | 1949-10-04 | 0 | Details |
| US2308473A | Refractory for contact with molten glass and process for ma… | Expired / Lapsed | 1939-09-07 | 1943-01-12 | 0 | Details |
| US2275155A | Internal tempering nozzle | Expired / Lapsed | 1939-11-25 | 1942-03-03 | 0 | Details |
| US2246461A | Operating mechanism for glass feeder plungers | Expired / Lapsed | 1938-08-25 | 1941-06-17 | 0 | Details |
| US2210509A | Method of forming over objects | Expired / Lapsed | 1937-05-17 | 1940-08-06 | 0 | Details |
| US2053938A | Glass level indicator | Expired / Lapsed | 1932-01-07 | 1936-09-08 | 0 | Details |
| US1973452A | Drift control for leers and drift responsive means therefor | Expired / Lapsed | 1933-03-06 | 1934-09-11 | 0 | Details |
| US1941411A | Regenerative glass melting furnace and burner control mecha… | Expired / Lapsed | 1930-10-03 | 1933-12-26 | 0 | Details |
| US1921380A | Timing device | Expired / Lapsed | 1930-12-19 | 1933-08-08 | 0 | Details |
| US1911119A | Glassware forming machine | Expired / Lapsed | 1928-05-04 | 1933-05-23 | 0 | Details |
| US1889510A | Apparatus for melting glass | Expired / Lapsed | 1928-04-19 | 1932-11-29 | 0 | Details |
| US1811832A | Automatic transfer machine | Expired / Lapsed | 1926-08-23 | 1931-06-23 | 0 | Details |
| US1798136A | Mold for shaping hollow glassware and method of controlling… | Expired / Lapsed | 1926-06-03 | 1931-03-31 | 0 | Details |
| US1766680A | Glass-ribbon-feeding apparatus and method | Expired / Lapsed | 1928-07-31 | 1930-06-24 | 0 | Details |
| US1745762A | Magnetic float valve | Expired / Lapsed | 1928-12-10 | 1930-02-04 | 0 | Details |
| US1733547A | Apparatus for handling glassware | Expired / Lapsed | 1926-08-23 | 1929-10-29 | 0 | Details |
| US1618660A | Apparatus for handling glassware | Expired / Lapsed | 1926-07-01 | 1927-02-22 | 0 | Details |
| US1592299A | Method and apparatus for making blown glassware | Expired / Lapsed | 1921-07-08 | 1926-07-13 | 0 | Details |