Patent US2932597A successfully refreshed from Google Patents.
US2932597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a polyester polytetrafluoroethylene resin laminated pipe
Assignee: Resistoflex Corp
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Filing: 1957-01-11
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Granted: 1960-04-12
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Expires: 1977-01-11
Abstract
No abstract record available.
Inventors
- 👤 John Alexander N T St
- 👤 Benjamin M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
THE METHOD OF MAKING A THERMOSETTING RESIN-FABRIC TUBE WITH AN INTEGRAL LINING OF POLYTETRAFLUORETHYLENE RESIN COMPRISING THE STEPS OF PLACING ON A MANDRES A CONTINUOUS LAYER OF PASTE-EXTRUDED PLOYTETRAFLUOROETHYLENE RESIN FREE OF VOLATILE CONSTITUENTS, THEREAFTER APPLYING ONE OR MORE WRAPS OF FABRIC WITH THE FINAL WRAP IMPREGNATED ON ITS INNER SURFACE ONLY AND ALL PREVIOUS WRAPS IMPREGNATED ON BOTH SURFACES WITH POLYTETRAFLUOROETHYLENE RESIN APPLYING HEAT AND PRESSURE TO THE WRAPPED LAYER RAISING THE TEMPRERATURE THEREOF TO ABOVE THE FUSION TEMPERATURE BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE RESIN TO FUSE TOGETHER ADJACENT RESIN SURFACES, COOLING AND RELEASING THE PRESSURE ON SAID WRAPPED LAYER TO PROVIDE A SUB-ASSEMBLY, THEREAFTER PLACING UPON SAID SUB-ASSEMBLY A PLURALITY OF WRAPS OF FABRIC SATURATED ON BOTH SURFACES WITH AN UNCURED THERMOSETTING RESIN TO FORM A COMPOSITE ASSEMBLY, CURING SAID THERMOSETTING RESIN AND THEREAFTER REMOVING SAID COMPOSITE ASSEMBLY FROM THE MANDREL, WHEREBY A UNITARY TUBULAR STRUCTURE IS FORMED HAVING ESSENTIALLY THE MECHANICAL PROPERTIES OF THE THERMOSETTING RESIN-FABRIC COMBINATION AND THE CHEMICALLY INERT PROPERTIES OF THE POLYTETRAFLUOROETHYLENE RESIN.
Claim 2
Independent Claim
171 words
THE METHOD OF MAKING A THERMOSETTING RESIN-FABRIC TUBE WITH AN INTEGRAL LINING OF POLYTETRAFLUORETHYLENE RESIN COMPRISING THE STEPS OF PLACING ON A MANDRES A CONTINUOUS LAYER OF PASTE-EXTRUDED PLOYTETRAFLUOROETHYLENE RESIN FREE OF VOLATILE CONSTITUENTS, THEREAFTER APPLYING ONE OR MORE WRAPS OF FABRIC WITH THE FINAL WRAP IMPREGNATED ON ITS INNER SURFACE ONLY AND ALL PREVIOUS WRAPS IMPREGNATED ON BOTH SURFACES WITH POLYTETRAFLUOROETHYLENE RESIN APPLYING HEAT AND PRESSURE TO THE WRAPPED LAYER RAISING THE TEMPRERATURE THEREOF TO ABOVE THE FUSION TEMPERATURE BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE RESIN TO FUSE TOGETHER ADJACENT RESIN SURFACES, COOLING AND RELEASING THE PRESSURE ON SAID WRAPPED LAYER TO PROVIDE A SUB-ASSEMBLY, THEREAFTER PLACING UPON SAID SUB-ASSEMBLY A PLURALITY OF WRAPS OF FABRIC SATURATED ON BOTH SURFACES WITH AN UNCURED THERMOSETTING RESIN TO FORM A COMPOSITE ASSEMBLY, CURING SAID THERMOSETTING RESIN AND THEREAFTER REMOVING SAID COMPOSITE ASSEMBLY FROM THE MANDREL, WHEREBY A UNITARY TUBULAR STRUCTURE IS FORMED HAVING ESSENTIALLY THE MECHANICAL PROPERTIES OF THE THERMOSETTING RESIN-FABRIC COMBINATION AND THE CHEMICALLY INERT PROPERTIES OF THE POLYTETRAFLUOROETHYLENE RESIN.
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) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |