Patent US2889474A successfully refreshed from Google Patents.
US2889474A
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Air supported rotor
Assignee: AIR GLIDE Inc
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Filing: 1957-03-04
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Granted: 1959-06-02
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Macks Elmer Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:36
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/02; G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/20; H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1675; H02K7/00; H02K7/08; H02K7/085; F16C2240/00; F16C2240/40; F16C2240/46; F16C2380/00; F16C2380/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |