US3307654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency fire escape apparatus
Assignee: Individual
•
Filing: 1965-08-02
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Granted: 1967-03-07
•
Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jack C Green
- 👤 Fred N Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
E; E06; E06C; E06C9/00; E06C9/06; E06C9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A FOLDABLE LADDER APPARATUS COMPRISING: A TOP SUPPORT RUNG; A PLURALITY OF STEP RUNGS; A PAIR OF WEBBING STRIPS HAVING ONE END OF EACH OF SAID STRIPS ROTATABLY ATTACHED ABOUT SAID TOP SUPPORT RUNG IN FIXED SPACED RELATIONSHIP WITH RESPECT TO EACH OTHER; EACH OF SAID PAIR OF STRIPS HAVING WOVEN SLOTS ARRANGED ALONG THE LENGTH OF EACH OF SAID STRIPS ADAPTED TO RECEIVE AND RETAIN THE OPPOSITE ENDS OF EACH OF SAID STEP RUNGS WHEREBY SAID STEP RUNGS ARE SPACED APART IN FIXED SPACED RELATIONSHIP WHEN THE LADDER IS UNFOLDED; A CASE FOR RELEASABLY ENCLOSING SAID PLURALITY OF STEP RUNGS IN A PREDETERMINED ORDER OF RELEASE WHICH EMBRACES SAID STEP RUNGS AND SAID TOP SUPPORT RUNG BETWEEN SAID PAIR OF STRIPS WHEREBY SAID PAIR OF STRIPS FORM CONSECUTIVE LOOPS IN LINE ALONG THE OPPOSITE EDGES OF SAID CASE; AND MEANS CARRIED ON SAID CASE FOR SELECTIVELY OPENING SAID CASE TO RELEASE SAID STEP RUNGS WHICH UNDER THE EFFECTS OF GRAVITY CAUSES SAID STEP RUNGS TO UNFOLD IN ACCORDANCE WITH SAID PREDETERMINED ORDER.
Claim 2
Dependent Claim
173 words
A FOLDABLE LADDER APPARATUS COMPRISING: A TOP SUPPORT RUNG; A PLURALITY OF STEP RUNGS; A PAIR OF WEBBING STRIPS HAVING ONE END OF EACH OF SAID STRIPS ROTATABLY ATTACHED ABOUT SAID TOP SUPPORT RUNG IN FIXED SPACED RELATIONSHIP WITH RESPECT TO EACH OTHER; EACH OF SAID PAIR OF STRIPS HAVING WOVEN SLOTS ARRANGED ALONG THE LENGTH OF EACH OF SAID STRIPS ADAPTED TO RECEIVE AND RETAIN THE OPPOSITE ENDS OF EACH OF SAID STEP RUNGS WHEREBY SAID STEP RUNGS ARE SPACED APART IN FIXED SPACED RELATIONSHIP WHEN THE LADDER IS UNFOLDED; A CASE FOR RELEASABLY ENCLOSING SAID PLURALITY OF STEP RUNGS IN A PREDETERMINED ORDER OF RELEASE WHICH EMBRACES SAID STEP RUNGS AND SAID TOP SUPPORT RUNG BETWEEN SAID PAIR OF STRIPS WHEREBY SAID PAIR OF STRIPS FORM CONSECUTIVE LOOPS IN LINE ALONG THE OPPOSITE EDGES OF SAID CASE; AND MEANS CARRIED ON SAID CASE FOR SELECTIVELY OPENING SAID CASE TO RELEASE SAID STEP RUNGS WHICH UNDER THE EFFECTS OF GRAVITY CAUSES SAID STEP RUNGS TO UNFOLD IN ACCORDANCE WITH SAID PREDETERMINED ORDER.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |