Patent US3568392A successfully refreshed from Google Patents.
US3568392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of installing a one piece swimming pool
Assignee: SAN JUAN PRODUCTS Inc
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Filing: 1969-04-10
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Granted: 1971-03-09
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Expires: 1989-04-10
Abstract
Abstract A ONE PIECE SWIMMING POOL LINER OF GLASS FIBER REINFORCED PLASTIC OR OTHER SUITABLE MATERIAL, IS INSTALLED AND LEVELED IN PLACE IN AN EXCAVATION LINED WITH SAND OR A CEMENTITIOUS MIXTURE, THE EXCAVATION CORRESPONDING ESSENTIALLY TO THE CONTOUR OF THE POOL LINER, BY PARTIALLY FILLING THE POOL WITH WATER AND INTRODUCING WATER INTO THE SAND LAYER AT A PRESSURE SUFFICIENT TO PERMEATE THE SAND LAYER AND RAISE OR FLOAT THE POOL AND SETTLE THE SAND UNDERNEATH THE POOL.
Inventors
- 👤 Robert G Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:04
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/0075; E04H4/0081; E02; E02D; E02D27/00; E02D27/32; E02D27/38; E02D3/00; E02D3/02; E02D3/10
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |