Patent US4828914A successfully refreshed from Google Patents.
US3587658A
Expired / Lapsed
US
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Self-erecting spiral tube device
Assignee: Ametek Inc
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Filing: 1968-10-24
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Granted: 1971-06-28
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Expires: 1988-10-24
Abstract
Abstract A TUBE COMPRISES A HELICAL AXIALLY EXTENDING RIBBON OF SPRING MATERIAL WHICH HAS ADJACENT TURNS SET TO COIL TIGHTLY IN OVERLAPPING AND TELESCOPING ENGAGEMENT.
Inventors
- 👤 Charles M Giltner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:59
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; E; E04; E04C; E04C3/00; E04C3/005; E04H; E04H12/00; E04H12/02; E04H12/08; F; F16; F16L; F16L9/00; F16L9/16; F16L9/165; Y; Y10; Y10T; Y10T428/00; Y10T428/13
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |