US3559331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catapult powered rectangular blade
Assignee: Individual
•
Filing: 1969-04-21
•
Granted: 1971-02-02
•
Expires: 1989-04-21
Abstract
Abstract AN ELONGATED RECTANGULAR BLADE, HORIZONTALLY PROJECTED AND RAPIDLY ROTATED ON A HORIZONTAL AXIS BY AN ELASTIC CATAPULT, IS THEREBY CAUSED TO SOAR ON A RISING TRAJECTORY UNTIL ITS SPINNING MOMENTUM IS DISSIPATED.
Inventors
- 👤 Pernell D Eller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:03
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/14
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |