US2862651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity control apparatus
Assignee: Individual
•
Filing: 1954-10-14
•
Granted: 1958-12-02
•
Expires: 1974-10-14
Abstract
No abstract record available.
Inventors
- 👤 Willard P Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
B; B62; B62D; B62D57/00; B62D57/04; F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2334070A
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US2375331A
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US2496179A
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FR946663A
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US2543833A
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US2690293A
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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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |