Sweetheart Plastics, Inc.
31Patents
0Active
31Granted
36Portfolio score
Filing activity: Jun 27, 1974 → Apr 12, 1982
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4127189A | Plastic food container | Performing Operations; Transporting | 103 | Expired |
| US4068115A | Food serving tray | Human Necessities | 97 | Expired |
| US4294371A | Sundae dish | Performing Operations; Transporting | 88 | Expired |
| US4093041A | Food serving system | Human Necessities | 77 | Expired |
| US4386188A | Thermoformable polymer blend composition | Chemistry; Metallurgy | 65 | Expired |
| US4183446A | Food container with integral dish and cover | Performing Operations; Transporting | 62 | Expired |
| US4386187A | Thermoformable polymer blend composition comprising styrene polymer, olefin polymer and block copolymer | Chemistry; Metallurgy | 58 | Expired |
| US4298133A | Integral tray and cover with snap lock | Performing Operations; Transporting | 52 | Expired |
| US4275815A | Lid | Performing Operations; Transporting | 45 | Expired |
| US3931890A | Stackable lid | Performing Operations; Transporting | 43 | Expired |
| US4076123A | Disposable plastic lid | Performing Operations; Transporting | 42 | Expired |
| USD263684S | Container for food or the like | General | 37 | Expired |
| USD243362S | Food tray temperature maintenance station | General | 30 | Expired |
| USD264686S | Packaging cup | General | 25 | Expired |
| US4316078A | Food serving system | Human Necessities | 23 | Expired |
| USD246955S | Disposable plastic lid | General | 23 | Expired |
| US4098403A | Beverage carrier | Performing Operations; Transporting | 20 | Expired |
| USD246945S | Coffee service tray | General | 20 | Expired |
| US4041277A | Portable tray warming unit | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4101252A | Sheet support apparatus | Performing Operations; Transporting | 16 | Expired |
| US4313358A | Dynamically balanced trim press | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4154345A | Food product containers and the method and apparatus for manufacturing same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4138504A | Food service method | Human Necessities | 12 | Expired |
| US4209101A | Tamper-proof closure and method of making same | Performing Operations; Transporting | 11 | Expired |
| US4125350A | Mechanical die adjustment mechanism | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.