Copar Corporation
11Patents
1Active
11Granted
33Portfolio score
Filing activity: Oct 7, 1974 → Nov 10, 2006 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4389971A | Means for controlling the application of glue to a defined area | Performing Operations; Transporting | 27 | Expired |
| US4516702A | Dripless valve | Performing Operations; Transporting | 23 | Expired |
| US4369080A | Means for sensing and controlling the amount of starch applied to form corrugated board | Physics | 22 | Expired |
| US4084539A | Voltage to air pressure transducer | Performing Operations; Transporting | 16 | Expired |
| US4389969A | Glue detector | Performing Operations; Transporting | 13 | Expired |
| US5676790A | Corrugating machine with thermal position sensing | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4258250A | Jam detector | Physics | 7 | Expired |
| US3970489A | Corrugator control system | Performing Operations; Transporting | 7 | Expired |
| US3944933A | Jam detection circuit | Performing Operations; Transporting | 6 | Expired |
| US4112379A | Jam detector | Performing Operations; Transporting | 4 | Expired |
| US7833376B2 | Apparatus and method for manufacturing corrugated boards | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.