US2941240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding tubing of polytetrafluoroethylene
Assignee: Jennings Machine Corp
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Filing: 1956-05-10
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Granted: 1960-06-21
•
Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Edward C Distler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/475; B29C48/022; B29C48/03; B29C48/09; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
APPARATUS SUITED FOR EXTRUDING TUBING OF POLYTETRAFLUOROETHYLENE COMPRISING A CYLINDER, A COAXIAL ORIFICE AT ONE END OF SAID CYLINDER, A MANDREL IN SAID ORIFICE, A MANDREL ROD HOLDING SAID MANDREL WITHIN SAID ORIFICE, A RAM FITTING SAID CYLINDER SURROUNDING SAID MANDREL ROD AND SLIDABLE WITH RESPECT THERETO, MEANS MOVING SAID RAM RECTILINEALLY INTO AND OUT OF SAID CYLINDER, A SEPARABLE JOINT IN SAID MANDREL ROD, AND DISPOSED FOR ACCESS IN THE SPACE BETWEEN SAID RAM AND SAID CYLINDER WHEN THE RAM IS MOVED OUT OF AND AWAY FROM SAID CYLINDER, AND MEANS MOVING THE UPPER PART OF SAID MANDREL ROD ABOVE SAID SEPARABLE JOINT AWAY FROM THE LOWER PART OF SAID MANDREL ROD BELOW SAID SEPARABLE JOINT TO PERMIT A CIRCUMFERENTIALLYCONTINUOUS TUBULAR PREFORM TO BE SLIPPED ONTO THE LOWER PART OF THE MANDREL ROD AND INTO SAID CYLINDER.
Claim 2
Dependent Claim
138 words
APPARATUS SUITED FOR EXTRUDING TUBING OF POLYTETRAFLUOROETHYLENE COMPRISING A CYLINDER, A COAXIAL ORIFICE AT ONE END OF SAID CYLINDER, A MANDREL IN SAID ORIFICE, A MANDREL ROD HOLDING SAID MANDREL WITHIN SAID ORIFICE, A RAM FITTING SAID CYLINDER SURROUNDING SAID MANDREL ROD AND SLIDABLE WITH RESPECT THERETO, MEANS MOVING SAID RAM RECTILINEALLY INTO AND OUT OF SAID CYLINDER, A SEPARABLE JOINT IN SAID MANDREL ROD, AND DISPOSED FOR ACCESS IN THE SPACE BETWEEN SAID RAM AND SAID CYLINDER WHEN THE RAM IS MOVED OUT OF AND AWAY FROM SAID CYLINDER, AND MEANS MOVING THE UPPER PART OF SAID MANDREL ROD ABOVE SAID SEPARABLE JOINT AWAY FROM THE LOWER PART OF SAID MANDREL ROD BELOW SAID SEPARABLE JOINT TO PERMIT A CIRCUMFERENTIALLYCONTINUOUS TUBULAR PREFORM TO BE SLIPPED ONTO THE LOWER PART OF THE MANDREL ROD AND INTO SAID CYLINDER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |