US3196194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fep-fluorocarbon tubing process
Assignee: Pennsylvania Fluorocarbon Co Inc
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Filing: 1964-06-04
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Granted: 1965-07-20
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Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Berten E Ely
- 👤 John W Burley
- 👤 Ira T Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:00
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; B; B29; B29C; B29C48/00; B29C48/022; B29C61/00; B29C61/003; B29C61/06; B29C61/08; C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L27/20; F16L11/06; F16L9/00; F16L9/12; F16L9/127; B29C48/001; B29C48/0018; B29C48/03; B29C48/09; B29C48/10; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS OF MAKING HEAT SHRINKABLE TUBING OF A COPOLYMER OF TETRAFLUOROETHYLENE AND 5 TO 35% BY WEIGHT OF HEXAFLUOROPROPYLENE WHICH COMPRISES MELT EXTRUDING SAID COPOLYMER INTO TUBING UNDER A FRONT BARREL TEMPERATURE OF 540 TO 550*F. AND A REAR BARREL TEMPERATURE OF 530 TO 540*F., AT A RATE OF EXTRUSION RELATED TO THE SIZE OF THE EXTRUDER AS FOLLOWS:
Claim 2
Dependent Claim
60 words
A PROCESS OF MAKING HEAT SHRINKABLE TUBING OF A COPOLYMER OF TETRAFLUOROETHYLENE AND 5 TO 35% BY WEIGHT OF HEXAFLUOROPROPYLENE WHICH COMPRISES MELT EXTRUDING SAID COPOLYMER INTO TUBING UNDER A FRONT BARREL TEMPERATURE OF 540 TO 550*F. AND A REAR BARREL TEMPERATURE OF 530 TO 540*F., AT A RATE OF EXTRUSION RELATED TO THE SIZE OF THE EXTRUDER AS FOLLOWS:
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |