US3428370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic suspension system
Assignee: Magnetfabrik Bonn GmbH
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Filing: 1965-10-22
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Granted: 1969-02-18
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Erich Steingroever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/12; G01R11/14; F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/0436; F16C32/044; F16C32/0444; F16C39/00; F16C39/06; F16C39/063; F16C2370/00
Claims Analysis
Total Claims: 0
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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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |