US3281963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Training vehicle for controlling attitude
Assignee: Individual
•
Filing: 1964-12-08
•
Granted: 1966-11-01
•
Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 Harold I Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:09
CPC Classifications
B; B64; B64G; B64G7/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A TRAINING VEHICLE COMPRISING: A BASE STRUCTURE HAVING A FLAT BOTTOM SURFACE AND A CONCAVE UPPER SURFACE, SAID SURFACES HAVING PERFORATIONS THERETHROUGH; MEANS ON SAID BASE STRUCTURE FOR DELIVERING PRESSURIZED AIR DOWNWARDLY THROUGH THE PERFORATIONS IN SAID FLAT BOTTOM SURFACE FOR FLOATING SAID BASE STRUCTURE ON A FILM OF AIR WHEN SAID VEHICLE IS PLACED OVER A LEVEL SURFACE; A PLATFORM; AND MEANS ON SAID BASE STRUCTURE FOR DELIVERING PRESSURIZED AIR UPWARDLY THROUGH THE PERFORATIONS IN SAID CONCAVE UPPER SURFACE FOR FLOATING SAID PLATFORM ATOP SAID CONCAVE UPPER SURFACE ON A FILM OF AIR.
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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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |