US3174185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion of molten thermoplastic material
Assignee: Crown Packaging UK Ltd
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Filing: 1962-04-10
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Granted: 1965-03-23
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 Gerber Kenneth George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/465; B29C48/467; B29C48/468; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A MIXING HEAD FOR MIXING OR HOMOGENIZING MOLTEN SYNTHETIC THERMOPLASTIC MATERIAL DURING MOVEMENT THEREOF TOWARDS AND EXTRUSION DIE, COMPRISING A HOLLOW CYLINDRICAL STATOR MEMBER AND A CYLINDRICAL ROTOR MEMBER ROTATABLE THEREIN ABOUT THE LONGITUDINAL AXIS THEREOF, SAID ROTOR MEMBER HAVING A MAXIMUM EXTERNAL DIAMETER OF THE STATOR LESS THAN THE MINIMUM INTERNAL DIAMETER OF THE STATOR MEMBER, ROWS OF GROOVES EXTENDING PERIPHERALLY AROUND THE INTERIOR SURFACE OF THE STATOR MEMBER AND SPACED APART AXIALLY THEREOF, THE GROOVES OF EACH ROW EXTENDING LONGITUDINALLY OF THE STATOR AND BEING EQUI-SPACED AROUND THE PERIPHERY THEREOF, ROWS OF GROOVES EXTENDING PERIPHERALLY AROUND THE EXTERIOR OF THE ROTOR MEMBER AND SPACED APART AXIALLY THEREOF, THE GROOVES OF EACH ROW EXTENDING LONGITUDINALLY OF THE ROTOR AND BEING EQUISPACED AROUND THE PERIPHERY THEREOF, THE NUMBER OF GROOVES IN EACH ROW OF THE STATOR MEMBER BEING DIFFERENT FROM THE NUMBER OF GROOVES IN EACH ROW OF THE ROTOR MEMBER, THE ROWS OF GROOVES IN THE ROTOR MEMBER BEING
Claim 2
Dependent Claim
160 words
A MIXING HEAD FOR MIXING OR HOMOGENIZING MOLTEN SYNTHETIC THERMOPLASTIC MATERIAL DURING MOVEMENT THEREOF TOWARDS AND EXTRUSION DIE, COMPRISING A HOLLOW CYLINDRICAL STATOR MEMBER AND A CYLINDRICAL ROTOR MEMBER ROTATABLE THEREIN ABOUT THE LONGITUDINAL AXIS THEREOF, SAID ROTOR MEMBER HAVING A MAXIMUM EXTERNAL DIAMETER OF THE STATOR LESS THAN THE MINIMUM INTERNAL DIAMETER OF THE STATOR MEMBER, ROWS OF GROOVES EXTENDING PERIPHERALLY AROUND THE INTERIOR SURFACE OF THE STATOR MEMBER AND SPACED APART AXIALLY THEREOF, THE GROOVES OF EACH ROW EXTENDING LONGITUDINALLY OF THE STATOR AND BEING EQUI-SPACED AROUND THE PERIPHERY THEREOF, ROWS OF GROOVES EXTENDING PERIPHERALLY AROUND THE EXTERIOR OF THE ROTOR MEMBER AND SPACED APART AXIALLY THEREOF, THE GROOVES OF EACH ROW EXTENDING LONGITUDINALLY OF THE ROTOR AND BEING EQUISPACED AROUND THE PERIPHERY THEREOF, THE NUMBER OF GROOVES IN EACH ROW OF THE STATOR MEMBER BEING DIFFERENT FROM THE NUMBER OF GROOVES IN EACH ROW OF THE ROTOR MEMBER, THE ROWS OF GROOVES IN THE ROTOR MEMBER BEING
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |