US3168290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing single screw extruder
Assignee: Dow Chemical Co
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Filing: 1962-06-20
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Granted: 1965-02-02
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Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Theodore C Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:15
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE COMBINATION OF AN EXTRUDER AND A MIXER ASSEMBLY, AND SEPARATE INDEPENDENT DRIVE MEANS FOR SAID EXTRUDER AND FOR SAID MIXER ASSEMBLY, SAID MIXER ASSEMBLY BEING ATTACHED TO THE DISCHARGE END THE BARREL OF THE EXTRUDER AND COMPRISING PIPE MEANS HAVING A LONGITUDINAL AXIS EXTENDING AT AN ANGLE TO THE LONGITUDINAL AXIS OF SAID EXTRUDER BARREL AND IN OPEN COMMUNICATION THEREWITH AT A JUNCTURE, A MIXING TORPEDO LOCATED WITHIN SAID PIPE
Claim 2
Dependent Claim
71 words
THE COMBINATION OF AN EXTRUDER AND A MIXER ASSEMBLY, AND SEPARATE INDEPENDENT DRIVE MEANS FOR SAID EXTRUDER AND FOR SAID MIXER ASSEMBLY, SAID MIXER ASSEMBLY BEING ATTACHED TO THE DISCHARGE END THE BARREL OF THE EXTRUDER AND COMPRISING PIPE MEANS HAVING A LONGITUDINAL AXIS EXTENDING AT AN ANGLE TO THE LONGITUDINAL AXIS OF SAID EXTRUDER BARREL AND IN OPEN COMMUNICATION THEREWITH AT A JUNCTURE, A MIXING TORPEDO LOCATED WITHIN SAID PIPE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |