US3295166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extruding polytetrafluoroethylene tubing and wire coating
Assignee: EIDP Inc
•
Filing: 1963-07-24
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Granted: 1967-01-03
•
Expires: 1983-07-24
Abstract
No abstract record available.
Inventors
- 👤 Owings Donald Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/022; B29C48/03; B29C48/06; B29C48/09; B29C48/15; B29C48/05; B29K; B29K2027/00; B29K2027/12; B29K2027/18; Y; Y10; Y10S; Y10S425/00; Y10S425/055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
EXTRUSION APPARATUS PARTICULARLY ADAPTED FOR THE PRODUCTION OF THIN-WALLED TUBING A TETRAFLUOROETHYLENE RESIN COMPRISING, IN COMBINATION, A DIE HAVING AN AREA OF CONVERGENCE, A BULBOUS GUIDE TIP FIXEDLY SECURED THEREIN, SAID BULBOUS GUIDE TIP HAVING AN INITIAL AREA OF DIVERGENCE, AN AREA OF CONVERGENCE AT THE LOWER END THEREOF, SAID AREAS BEING JOINED BY A SMOOTHLY BLENDING, INTERMEDIATE AREA, SAID DIE HAVING AN ANGLE OF CONVERGENCE SUBSTANTIALLY THE SAME AS THE ANGLE OF CONVERGENCE OF SAID GUIDE TIP, SAID DIVERGING AND CONVERGING AREAS OF SAID GUIDE TIP BEING CONTAINED WITHIN SAID CONVERGING AREA OF SAID DIE, SAID GUIDE TIP BEING SPACED FROM SAID DIE A DISTANCE OF 5 TO 15 TIMES THE DESIRED WALL THICKNESS OF THE RESULTANT TUBE.
Claim 2
Dependent Claim
119 words
EXTRUSION APPARATUS PARTICULARLY ADAPTED FOR THE PRODUCTION OF THIN-WALLED TUBING A TETRAFLUOROETHYLENE RESIN COMPRISING, IN COMBINATION, A DIE HAVING AN AREA OF CONVERGENCE, A BULBOUS GUIDE TIP FIXEDLY SECURED THEREIN, SAID BULBOUS GUIDE TIP HAVING AN INITIAL AREA OF DIVERGENCE, AN AREA OF CONVERGENCE AT THE LOWER END THEREOF, SAID AREAS BEING JOINED BY A SMOOTHLY BLENDING, INTERMEDIATE AREA, SAID DIE HAVING AN ANGLE OF CONVERGENCE SUBSTANTIALLY THE SAME AS THE ANGLE OF CONVERGENCE OF SAID GUIDE TIP, SAID DIVERGING AND CONVERGING AREAS OF SAID GUIDE TIP BEING CONTAINED WITHIN SAID CONVERGING AREA OF SAID DIE, SAID GUIDE TIP BEING SPACED FROM SAID DIE A DISTANCE OF 5 TO 15 TIMES THE DESIRED WALL THICKNESS OF THE RESULTANT TUBE.
References Cited (Backward Citations)
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |