Patent US3219100A successfully refreshed from Google Patents.
Patent US3127953A successfully refreshed from Google Patents.
US3127953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety ladder
Assignee: Individual
•
Filing: 1960-02-17
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Granted: 1964-04-07
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Expires: 1980-02-17
Abstract
No abstract record available.
Inventors
- 👤 Shore Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:32
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/39; E06C1/393; E06C7/00; E06C7/42; E06C7/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A SAFETY LADDER COMPRISING A TUBULAR MEMBER BENT IN A U-SHAPED GUARDRAIL, A SPACER MEMBER SECURED BETWEEN THE LEGS OF SAID GUARDRAIL MEMBER ADJACENT THE ENDS THEREOF, TWO LEGS MEMBERS PIVOTALLY SECURED IN SPACED RELATION TO SAID GUARDRAIL LEGS, TWO STEP MEMBERS RESPECTIVELY PIVOTALLY LINKED TO SAID GUARDRAIL LEGS AND TO SAID LEG MEMBERS AND A PAIR OF BARS FIXEDLY CONNECTED TO THE UNDERSURFACE OF A FIRST ONE OF SAID STEP MEMBERS AND PIVOTALLY CONNECTED TO THE UNDERSURFACE OF THE SECOND STEP MEMBER AT POINTS INTERMEDIATE THE FORWARD AND REAR EDGES THEREOF TO PERMIT FOLDING THEREOF ESSENTIALLY ONLY IN AN UPWARD DIRECTION AND AFFORDING A SUPPORT FOR AN UNDERSURFACE OF SAID SECOND STEP MEMBER TO POSITION UPPER PLATFORM SURFACES OF SAID STEP MEMBERS IN SUBSTANTIALLY THE SAME PLANE AND SHELF PIVOTALLY LINKED TO SAID GUARDRAIL LEGS ABOVE SAID STEP MEMBERS AND TO ONE OF SAID STEP MEMBERS SO THAT SAID SHELF FOLDS UP WITH SAID STEP MEMBERS, WHEREBY SAID STEP MEMBERS CAN BE FOLDED UP BY RAISING SAID SHELF.
Claim 2
Dependent Claim
169 words
A SAFETY LADDER COMPRISING A TUBULAR MEMBER BENT IN A U-SHAPED GUARDRAIL, A SPACER MEMBER SECURED BETWEEN THE LEGS OF SAID GUARDRAIL MEMBER ADJACENT THE ENDS THEREOF, TWO LEGS MEMBERS PIVOTALLY SECURED IN SPACED RELATION TO SAID GUARDRAIL LEGS, TWO STEP MEMBERS RESPECTIVELY PIVOTALLY LINKED TO SAID GUARDRAIL LEGS AND TO SAID LEG MEMBERS AND A PAIR OF BARS FIXEDLY CONNECTED TO THE UNDERSURFACE OF A FIRST ONE OF SAID STEP MEMBERS AND PIVOTALLY CONNECTED TO THE UNDERSURFACE OF THE SECOND STEP MEMBER AT POINTS INTERMEDIATE THE FORWARD AND REAR EDGES THEREOF TO PERMIT FOLDING THEREOF ESSENTIALLY ONLY IN AN UPWARD DIRECTION AND AFFORDING A SUPPORT FOR AN UNDERSURFACE OF SAID SECOND STEP MEMBER TO POSITION UPPER PLATFORM SURFACES OF SAID STEP MEMBERS IN SUBSTANTIALLY THE SAME PLANE AND SHELF PIVOTALLY LINKED TO SAID GUARDRAIL LEGS ABOVE SAID STEP MEMBERS AND TO ONE OF SAID STEP MEMBERS SO THAT SAID SHELF FOLDS UP WITH SAID STEP MEMBERS, WHEREBY SAID STEP MEMBERS CAN BE FOLDED UP BY RAISING SAID SHELF.
References Cited (Backward Citations)
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Cited
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Cited
GB431860A
Cited
US2146020A
Cited
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Cited
FR1103090A
Cited
US2839233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |