Patent US3564622A successfully refreshed from Google Patents.
US3564622A
Expired / Lapsed
US
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Swimming pool with vertically adjustable bottom
Assignee: Grontmij Grondverbetering-En Ontginningmaatschappij NV
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Filing: 1968-11-22
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Granted: 1971-02-23
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Expires: 1988-11-22
Abstract
Abstract A SWIMMING POOL HAS A BOTTOM WHICH IS VERTICALLY ADJUSTABLE TO REGULATE THE DEPTH OF THE POOL FOR TRAINING AND OTHER PURPOSES, BY MEANS OF HYDRAULIC JACKS INCLUDING GUIDE MEANS FOR BRAKING THE VERTICAL MOVEMENT OF THE POOL BOTTOM WHEN IT TILTS.
Inventors
- 👤 Bernard Johannes Kle Meulekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:28
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E04H4/065
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |