US3605817A
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US
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Flexible corrugated tubing having improved performance characteristics
Assignee: Acme Hamilton Manufacturing Corp
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Filing: 1969-09-22
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Granted: 1971-09-20
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Expires: 1989-09-22
Abstract
Abstract FLEXIBLE CORRUGATED TUBING, PREFERABLY FORMED OF A THERMOPLASTIC MATERIAL HAVING A CONFIGURATION FOR ELIMINATTING ANNOYING WHISTLING WHICH OCCURS IN CONVENTIONAL TUBING USED FOR MOVING AIR AT RELATIVELY HIGH VELOCITIES. THE PITCH AND/OR ROUGHNESS OF THE TUBING INTERIOR SURFACE IS CONTROLLED DURING FORMATION OF THE TUBING. THE TUBING MAY BE FORMED IN A CONTINUOUS PROCESS, FOR EXAMPLE, IN THE MANNER DESCRIBED IN U.S. PAT. 3,280,430, ISSUED OCT. 25,1966, WHICH IS FURTHER PROVIDED WITH MEANS COMBINED WITHIN THE MOLDS TO CONTROL THE CONFIGURATION OF THE TUBING.
Inventors
- 👤 Joseph F Bauman
- 👤 Edward Kurtz Jr
- 👤 Adrian V Cini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:05
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C49/00; B29C49/0015; B29C49/0029; F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; B29C48/03; B29C48/09; B29C48/12; B29C48/13; B29L; B29L2023/00; B29L2023/003
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |