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US3309716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool net elevator
Assignee: Individual
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Filing: 1964-10-26
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Granted: 1967-03-21
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Earl L Merritt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:21
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E04H4/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AN AUTOMATIC SWIMMING POOL NET SYSTEM COMPRISING, A SAFETY NET SHAPED TO COVER THE SURFACE AREA OF A SWIMMING POOL, A WELL FORMED IN THE FLOOR OF A SWIMMING POOL, A CYLINDER HAVING ITS UPPER END ENCLOSED, SAID CYLINDER SHAPED TO FIT INTO SAID WELL, SAID CYLINDER ATTACHED TO SAID SAFETY NET, MEANS FOR INTRODUCING A STREAM OF AIR INTO SAID CYLINDER WHEN SAID CYLINDER IS WITHIN SAID WELL, MEANS FOR RETAINING AND RELEASING SAID CYLINDER WITHIN SAID WELL AGAINST THE BOUYANT FORCE OF AIR WITHIN SAID CYLINDER, SAID CYLINDER AND SAID SAFETY NET RISING TO THE SURFACE OF SAID POOL WHEN SAID RETAINING MEANS ARE RELEASED, AND MEANS FOR EXHAUSTING THE AIR WITHIN SAID CYLINDER WHEN SAID NET AND SAID CYLINDER ARE FLOATING AT THE SURFACE OF SAID POOL, TO SINK SAID CYLINDER AND SAID NET TO THE FLOOR OF SAID POOL WHEN SAID SUPPLY OF AIR WITHIN SAID CYLINDER IS EXHAUSTED.
Claim 2
Dependent Claim
153 words
AN AUTOMATIC SWIMMING POOL NET SYSTEM COMPRISING, A SAFETY NET SHAPED TO COVER THE SURFACE AREA OF A SWIMMING POOL, A WELL FORMED IN THE FLOOR OF A SWIMMING POOL, A CYLINDER HAVING ITS UPPER END ENCLOSED, SAID CYLINDER SHAPED TO FIT INTO SAID WELL, SAID CYLINDER ATTACHED TO SAID SAFETY NET, MEANS FOR INTRODUCING A STREAM OF AIR INTO SAID CYLINDER WHEN SAID CYLINDER IS WITHIN SAID WELL, MEANS FOR RETAINING AND RELEASING SAID CYLINDER WITHIN SAID WELL AGAINST THE BOUYANT FORCE OF AIR WITHIN SAID CYLINDER, SAID CYLINDER AND SAID SAFETY NET RISING TO THE SURFACE OF SAID POOL WHEN SAID RETAINING MEANS ARE RELEASED, AND MEANS FOR EXHAUSTING THE AIR WITHIN SAID CYLINDER WHEN SAID NET AND SAID CYLINDER ARE FLOATING AT THE SURFACE OF SAID POOL, TO SINK SAID CYLINDER AND SAID NET TO THE FLOOR OF SAID POOL WHEN SAID SUPPLY OF AIR WITHIN SAID CYLINDER IS EXHAUSTED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |