Patent US3261056A successfully refreshed from Google Patents.
US3261056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for working up thermoplastic synthetic material
Assignee: Werner and Pfleiderer GmbH
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Filing: 1965-02-16
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Granted: 1966-07-19
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Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Fritsch Rudolf Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/38; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A DEVICE FOR WORKING UP THEREMOPLASTIC SYNTHETIC MATERIAL BY DENSIFYING, PLASTICIZING AND EXTRUDING, SAID DEVICE COMPRISING SEVERAL ROTARY WORM EXTRUDING MEANS DISPOSED IN SERIES ARRANGEMENT AND IN COMMUNICATION WITH EACH OTHER FOR FEEDING THE MATERIAL TO BE WORKED UP SEQUENTIALLY THROUGH SAID EXTRUDING MEANS, AND A ROTARY DRIVE MEANS FOR EACH OF SAID EXTRUDING MEANS FOR INDEPENDENTLY DRIVING THE SAME, THE SEQUENTIALLY FIRST ONE OF SAID EXTRUDING MEANS CONSTITUTING A DENSIFYING MEANS AND HAVING A COMPARATIVELY NARROW DIAMETER AND BEING DRIVEN AT A COMPARATIVELY HIGH RATE OF R.P.M. BY THE RESPECTIVE DRIVE MEANS, THE SEQUENTIALLY SECOND ONE OF SAID EXTRUDING MEANS CONSITUTING A PLASTICIZING MEANS AND HAVING A WIDER DIAMETER AND BEING DRIVEN AT A LOWER RATE OF R.P.M. AND THE SEQUENTIALLY THIRD ONE OF SAID EXTRUDING MEANS CONSTITUTING A DISCHARGE MEANS AND HAVING A STILL LARGER DIAMETER AND BEING DRIVEN AT A STILL LOWER RATE OF R.P.M.
Claim 2
Independent Claim
148 words
A DEVICE FOR WORKING UP THEREMOPLASTIC SYNTHETIC MATERIAL BY DENSIFYING, PLASTICIZING AND EXTRUDING, SAID DEVICE COMPRISING SEVERAL ROTARY WORM EXTRUDING MEANS DISPOSED IN SERIES ARRANGEMENT AND IN COMMUNICATION WITH EACH OTHER FOR FEEDING THE MATERIAL TO BE WORKED UP SEQUENTIALLY THROUGH SAID EXTRUDING MEANS, AND A ROTARY DRIVE MEANS FOR EACH OF SAID EXTRUDING MEANS FOR INDEPENDENTLY DRIVING THE SAME, THE SEQUENTIALLY FIRST ONE OF SAID EXTRUDING MEANS CONSTITUTING A DENSIFYING MEANS AND HAVING A COMPARATIVELY NARROW DIAMETER AND BEING DRIVEN AT A COMPARATIVELY HIGH RATE OF R.P.M. BY THE RESPECTIVE DRIVE MEANS, THE SEQUENTIALLY SECOND ONE OF SAID EXTRUDING MEANS CONSITUTING A PLASTICIZING MEANS AND HAVING A WIDER DIAMETER AND BEING DRIVEN AT A LOWER RATE OF R.P.M. AND THE SEQUENTIALLY THIRD ONE OF SAID EXTRUDING MEANS CONSTITUTING A DISCHARGE MEANS AND HAVING A STILL LARGER DIAMETER AND BEING DRIVEN AT A STILL LOWER RATE OF R.P.M.
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |