US3583028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated extruder
Assignee: JURY MIKHAILOVICH PLESKACHEVSK
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Filing: 1968-08-16
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Granted: 1971-06-08
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Expires: 1988-08-16
Abstract
Abstract AN EXTRUDER HAVING A HOLLOW BODY AND A WORM SUPPORTED THEREIN IS CONNECTED IN AN ELECTRIC CICUIT SO THAT THE WORM AND THE HOLLOW BODY ANNULARLY SPACED THEREFROM CONSTITUTE HEATING ELEMENTS FOR HEATING A THERMOPLASTIC MATERIAL. AS AN ALTERNATIVE EMBODIMENT, THE HOLLOW BODY CAN BE SURROUNDED BY A HOUSING ANNULARLY SPACED THEREFROM, THE HOLLOW BODY AND THE HOUSING THEN CONSTITUTING THE HEATING ELEMENTS, THE INNERMOST HEATING ELEMENT IN EACH EMBODIMENT BEING HEATED TO A HIGHER TEMPERATURE THAN THAT OF THE OUTERMOST HEATING ELEMENT DUE TO THE ANNULAR PROXIMITY THEREBETWEEN.
Inventors
- 👤 Vladimir Alexeevich Bely
- 👤 Evgeny Mikhailovich Vvedensky
- 👤 Vitaly Alexeevich Ivolgin
- 👤 Jury Mikhailovic Pleskachevsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/03; B29C48/07; B29C48/08; B29C48/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |