Patent US2670200A successfully refreshed from Google Patents.
US2670200A
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Resilient suspension springs
Assignee: Dunlop Rubber Co Ltd
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Filing: 1952-04-01
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Granted: 1954-02-23
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Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 Seddon Robert Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:23
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/22; B60G3/00; B60G3/18; B60G3/185; F; F16; F16F; F16F3/00; F16F3/08; F16F3/087; F16F3/0873; F16F3/0876; B60G2200/00; B60G2200/10; B60G2200/13; B60G2202/00; B60G2202/10; B60G2202/14; B60G2202/143; B60G2204/00; B60G2204/10; B60G2204/14; B60G2204/143; B60G2206/00; B60G2206/01; B60G2206/10; B60G2206/11; F16F2236/00; F16F2236/04; F16F2236/045; H; H05; H05B; H05B47/00; H05B47/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402400A
Cited
US2574420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |