Patent US3273201A successfully refreshed from Google Patents.
US3273201A
Expired / Lapsed
US
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Feed screw for extrusion press
Assignee: Reifenhauser KG
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Filing: 1965-06-28
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Granted: 1966-09-20
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Reifenhauser Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/59; B29C48/605; B29C48/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A FEED SCREW FOR DELIVERING PLASTIFIED RESINUOS MATERIAL TO THE NOZZLE OF AN EXTRUSION PRESS, COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY PROVIDED WITH AT LEAST ONE EXTERNAL HELICOIDAL THREAD, SAID THREAD BEING SPLIT LONGITUDINALLY INTO A PLURALITY OF PERIPHERALLY OFFSET SECTIONS WITH SPACEDLY OVERLAPPING ENDS, SAID OVERLAPPING ENDS EXTENDING AT LEAST TO A COMMON PLANE TRANSVERSE TO THE AXIS OF SAID BODY.
Claim 2
Dependent Claim
61 words
A FEED SCREW FOR DELIVERING PLASTIFIED RESINUOS MATERIAL TO THE NOZZLE OF AN EXTRUSION PRESS, COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY PROVIDED WITH AT LEAST ONE EXTERNAL HELICOIDAL THREAD, SAID THREAD BEING SPLIT LONGITUDINALLY INTO A PLURALITY OF PERIPHERALLY OFFSET SECTIONS WITH SPACEDLY OVERLAPPING ENDS, SAID OVERLAPPING ENDS EXTENDING AT LEAST TO A COMMON PLANE TRANSVERSE TO THE AXIS OF SAID BODY.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |