Patent US3106986A successfully refreshed from Google Patents.
US3106986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible safety cage for ladders
Assignee: United States Steel Corp
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Filing: 1962-09-12
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Granted: 1963-10-15
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Expires: 1982-09-12
Abstract
No abstract record available.
Inventors
- 👤 William H Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:47
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/18; E06C7/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A SAFETY CAGE FOR A FIXED VERTICAL LADDER COMPRISING A PLURALITY OF LOOPS OF LINKS SPACED VERTICALLY OF THE LADDER, EACH LOOP HAVING ITS ENDS PIVOTED, RESPECTIVELY ON AXES ADJACENT THE SIDES OF THE LADDER AND SUBSTANTIALLY PARALLEL THERETO, AND RODS EXTENDING BETWEEN CORRESPONDING LINKS OF SAID LOOPS.
Claim 2
Dependent Claim
48 words
A SAFETY CAGE FOR A FIXED VERTICAL LADDER COMPRISING A PLURALITY OF LOOPS OF LINKS SPACED VERTICALLY OF THE LADDER, EACH LOOP HAVING ITS ENDS PIVOTED, RESPECTIVELY ON AXES ADJACENT THE SIDES OF THE LADDER AND SUBSTANTIALLY PARALLEL THERETO, AND RODS EXTENDING BETWEEN CORRESPONDING LINKS OF SAID LOOPS.
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) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |