Hartford Empire Co
Hartford EActive Patents
0
Total Holdings
36
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 |
| US2466693A | Crate unloader | Expired / Lapsed | 1944-06-03 | 1949-04-12 | 0 | Details |
| US2409298A | Drier for decorated ware | Expired / Lapsed | 1945-03-10 | 1946-10-15 | 0 | Details |
| US2335128A | Lehr for glassware | Expired / Lapsed | 1941-11-05 | 1943-11-23 | 0 | Details |
| US2331702A | Method of molding hollow articles of plastic material | Expired / Lapsed | 1938-05-13 | 1943-10-12 | 0 | Details |
| US2331687A | Method of and machine for forming hollow articles of plasti… | Expired / Lapsed | 1938-05-13 | 1943-10-12 | 0 | Details |
| US2321555A | Internal nozzle for tempering bottles and other glass conta… | Expired / Lapsed | 1941-04-26 | 1943-06-08 | 0 | Details |
| US2308473A | Refractory for contact with molten glass and process for ma… | Expired / Lapsed | 1939-09-07 | 1943-01-12 | 0 | Details |
| US2282848A | Apparatus for blowing and cooling glassware | Expired / Lapsed | 1939-03-17 | 1942-05-12 | 0 | Details |
| US2275155A | Internal tempering nozzle | Expired / Lapsed | 1939-11-25 | 1942-03-03 | 0 | Details |
| US2253155A | Apparatus for stacking glassware | Expired / Lapsed | 1939-03-27 | 1941-08-19 | 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 |
| US2171770A | Cigarette tip | Expired / Lapsed | 1937-04-20 | 1939-09-05 | 0 | Details |
| US2123145A | Device for blowing and cooling glassware | Expired / Lapsed | 1936-10-30 | 1938-07-05 | 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 |
| US1961893A | Automatic level control system | Expired / Lapsed | 1933-07-26 | 1934-06-05 | 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 |
| US1921389A | Glassware transfer device | Expired / Lapsed | 1929-11-29 | 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 |
| US1853842A | Apparatus for and method of feeding molten glass | Expired / Lapsed | 1929-10-12 | 1932-04-12 | 0 | Details |
| US1835579A | Apparatus for handling glassware | Expired / Lapsed | 1926-06-22 | 1931-12-08 | 0 | Details |
| US1811832A | Automatic transfer machine | Expired / Lapsed | 1926-08-23 | 1931-06-23 | 0 | Details |
| US1803031A | Apparatus for annealing glassware | Expired / Lapsed | 1926-03-11 | 1931-04-28 | 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 |
| US1766638A | Drawing glass tubing | Expired / Lapsed | 1923-05-28 | 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 |
| US1706857A | Apparatus for the precise determination of the level of gla… | Expired / Lapsed | 1926-08-10 | 1929-03-26 | 0 | Details |
| US1650577A | Zirconia-faced refractory | Expired / Lapsed | 1926-01-20 | 1927-11-22 | 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 |