US3225863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety ladder
Assignee: Individual
•
Filing: 1964-06-04
•
Granted: 1965-12-28
•
Expires: 1984-06-04
Abstract
No abstract record available.
Inventors
- 👤 Howard T Ludlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:09
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
IN A DEVICE FOR A SWIMMING POOL, A SUPPORT, A LADDER, SAID LADDER RESTING ON SAID SUPPORT, HINGE MEANS SECURED TO THE BOTTOM END OF SAID LATTER AND ADJACENT SAID SUPPORT, AN ELONGATED COVER SECURED AT ITS BOTTOM END TO SAID HINGE MEANS FOR MOVEMENT BETWEEN AN OPEN POSITION RESTING ON SAID SUPPORT AND A CLOSED POSITION COVERING SAID LADDER AND MEANS LOCKING SAID COVER TO SAID ONE LADDER IN SAID CLOSED POSITION.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |