US3562823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave producing machine,especially for swimming pools
Assignee: Individual
•
Filing: 1968-07-09
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Granted: 1971-02-16
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Expires: 1988-07-09
Abstract
Abstract A SWIMMING POOL EQUIPPED WITH OSCILLATING BLADE MEANS FOR ACTUATING THE WATER IN THE POOL, IN WHICH SAID BLADE MEANS IS COMPLETELY BELOW THE WATER LEVEL WHEN THE WATER IS AT REST WHILE ACTUATING MEANS ARRANTED OUTSIDE THE SWIMMING POOL ARE DRIVINGLY CONNECTED TO SAID BLADE MEANS FOR PIVOTING THE SAME BACK AND FORTH.
Inventors
- 👤 Friedrich Koster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:03
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/0006; E21; E21D; E21D11/00
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |