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US4044799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular wall hose and method for making same
Assignee: GILMOUR HOSE Co
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Filing: 1972-02-16
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Granted: 1977-08-30
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Expires: 1992-02-16
Abstract
Abstract A method for simultaneously extruding and foaming a seamless, closed cell, cellular, tubular conduit by extruding through no-land die and restricting foaming action until the conduit has been extruded. The resultant conduit can be made either uni-layer or multiple layer, with or without reinforcing with any of the layers foamed to produce an extremely flexible hose at a wide temperature range and having great resistance to kinking.
Inventors
- 👤 Charles D. Higbee
- 👤 Bennie A. Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:21
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; C; C08; C08J; C08J9/00; C08J9/04; F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; B29L; B29L2023/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
An extruded, foamed, tubular product comprising: an inner seamless tube having a multitude of closed gas-filled cells interspersed throughout the walls of said tube; an outer cover comprising a wall structure having a multitude of gas-filled cells interspersed throughout said walls of the outer cover; and at least one intermediate seamless, closed cell, cellular layer contiguous to the next adjacent inner layer and the next concentric outer layer.
Claim 2
Dependent Claim
68 words
An extruded, foamed, tubular product comprising: an inner seamless tube having a multitude of closed gas-filled cells interspersed throughout the walls of said tube; an outer cover comprising a wall structure having a multitude of gas-filled cells interspersed throughout said walls of the outer cover; and at least one intermediate seamless, closed cell, cellular layer contiguous to the next adjacent inner layer and the next concentric outer layer.
Claim 3
Dependent Claim
17 words
A structure according to claim 1 in which a reinforcing structure is placed between each contiguous layer.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |