Patent US2645249A successfully refreshed from Google Patents.
US2645249A
Expired / Lapsed
US
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Plastic resin tubing and method of making the same
Assignee: OSCAR C STAHL
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Filing: 1949-04-30
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Granted: 1953-07-14
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Expires: 1969-04-30
Abstract
No abstract record available.
Inventors
- 👤 Davis Elbert
- 👤 Oscar C Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A FLEXIBLE TUBING OF A THERMOPLASTIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, VINLY CHLORIDE-VINYL ACETATE COPOLYMERS, AND VINYL CHLORIDE-VINYLIDENE COPOLYMERS, COMPRISING AN EXTRUDED, SEAMLESS, FLEXIBLE INNER TUBING OF SAID RESIN HAVING A SUBSTANTIALLY CONCENTRIC OUTER LAYER OF SAID RESIN FUSED THERETO AND INTEGRAL THEREWITH TO FORM A SUBSTANTIALLY HOMOGENEOUS TUBE OF SAID RESIN, THE RESIN OF SAID EXTRUDED INNER TUBE CONTAINING AT LEAST ONE ADDITIVE WHICH IMPARTS HIGH TENSILE AND BURST STRENGTH AND THE RESIN OF SAID OUTER LAYER CONTAINING AT LEAST ONE ADDITIVE WHICH IMPARTS HIGH ABRASION AND WEATHER RESISTANCE.
Claim 2
Dependent Claim
94 words
A FLEXIBLE TUBING OF A THERMOPLASTIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, VINLY CHLORIDE-VINYL ACETATE COPOLYMERS, AND VINYL CHLORIDE-VINYLIDENE COPOLYMERS, COMPRISING AN EXTRUDED, SEAMLESS, FLEXIBLE INNER TUBING OF SAID RESIN HAVING A SUBSTANTIALLY CONCENTRIC OUTER LAYER OF SAID RESIN FUSED THERETO AND INTEGRAL THEREWITH TO FORM A SUBSTANTIALLY HOMOGENEOUS TUBE OF SAID RESIN, THE RESIN OF SAID EXTRUDED INNER TUBE CONTAINING AT LEAST ONE ADDITIVE WHICH IMPARTS HIGH TENSILE AND BURST STRENGTH AND THE RESIN OF SAID OUTER LAYER CONTAINING AT LEAST ONE ADDITIVE WHICH IMPARTS HIGH ABRASION AND WEATHER RESISTANCE.
References Cited (Backward Citations)
US1895022A
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US2053112A
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US2027961A
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US2176997A
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US2245708A
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US2453052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |