US3487800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind-propelled apparatus
Assignee: WINDSURFING INTERNATIONAL Inc
•
Filing: 1968-03-27
•
Granted: 1970-01-06
•
Expires: 1988-03-27
Abstract
No abstract record available.
Inventors
- 👤 Hoyle Schweitzer
- 👤 James Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/60; B63B32/40; B63B32/50; B63B32/56; B63H; B63H8/00; B63H8/20; B63H8/23; B63H8/24; B63B32/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2353007A
Cited
US3141435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |