Patent US3553744A successfully refreshed from Google Patents.
US3553744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aboveground swimming pool construction
Assignee: PLAYGROUND CORP OF AMERICA
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Filing: 1969-06-23
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Granted: 1971-01-12
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Expires: 1989-06-23
Abstract
Abstract AN ABOVEGROUND SWIMMING POOL IN WHICH A PERIPHERAL WALL STRUCTURE IS SUPPORTED BY A PLURALITY OF SUPPORT FRAMES AND A PERIPHERAL RIM STRUCTURE INCLUDING A DEPENDING SKIRT AND AN OUTWARDLY PROJECTING DECK IS SUPPORTED BY A PLURALITY OF SUBFRAMES, EACH SUBFRAME BEING AFFIXED TO A SUPPORT FRAME BY MEANS ENABLING ADJUSTMENT OF THE LEVEL OF THE PERIPHERAL RIM STRUCTURE WITH RESPECT TO A CORRESPONDING SUPPORT FRAME SUCH THAT THE PERIPHERAL RIM STRUCTURE MAY BE MAINTAINED AT A CONSTANT HORIZONTAL LEVEL WHILE THE LEVEL OF THE SUPPORT FRAMES MAY VARY.
Inventors
- 👤 Edgar T Gillen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:32
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/0018
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |