US3233702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-leveling ladder
Assignee: Individual
•
Filing: 1964-05-08
•
Granted: 1966-02-08
•
Expires: 1984-05-08
Abstract
No abstract record available.
Inventors
- 👤 Floyd L Feltrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A LADDER HAVING SIDE BARS AND A PLURALITY OF SPACED RUNGS CONNECTING SAID SIDE BARS, RESPECTIVE BOTTOM EXTENSION BARS SLIDABLY CONNECTED TO SAID SIDE BARS, A HORIZONTAL ROD RIGIDLY SECURED ON AT LEAST ONE OF THE EXTENSION BARS, A LOCKING SLEEVE SLIDABLY MOUNTED ON SAID ROD AND HAVING A LOCKING LUG LOCKINGLY ENGAGEABLE WITH THE ADJACENT SIDE BAR, MEANS BIASING THE LOCKING SLEEVE TO RE-
Claim 2
Dependent Claim
66 words
IN A LADDER HAVING SIDE BARS AND A PLURALITY OF SPACED RUNGS CONNECTING SAID SIDE BARS, RESPECTIVE BOTTOM EXTENSION BARS SLIDABLY CONNECTED TO SAID SIDE BARS, A HORIZONTAL ROD RIGIDLY SECURED ON AT LEAST ONE OF THE EXTENSION BARS, A LOCKING SLEEVE SLIDABLY MOUNTED ON SAID ROD AND HAVING A LOCKING LUG LOCKINGLY ENGAGEABLE WITH THE ADJACENT SIDE BAR, MEANS BIASING THE LOCKING SLEEVE TO RE-
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |