Patent US3286789A successfully refreshed from Google Patents.
US3286789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible ladder
Assignee: Individual
•
Filing: 1964-11-30
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Granted: 1966-11-22
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Expires: 1984-11-30
Abstract
No abstract record available.
Inventors
- 👤 Paul O Planchon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:32
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A FOLDING LADDER COMPRISING A PLURALITY OF HINGEDLY INTERCONNECTED LADDER SECTIONS, SAID SECTIONS EACH INCLUDING A PAIR OF SPACED RAILS CONNECTED BY A PLURALITY OF RUNGS, SAID RAILS HAVING AN OUTER RAIL MEMBER CONTAINING A RIGID SLIDABLE CAPTURED INNER RAIL MEMBER, HINGE MEANS CONNECTING THE PROXIMATE END PORTIONS OF SAID ALIGNED RAIL MEMBERS, SAID INNER AND OUTER RAIL MEMBERS BEING OF SUCH A LENGTH TO PERMIT ACCORDION LIKE FOLDING OF SAID SECTIONS INTO JUXTAPOSITION WHEN SAID HINGE MEANS OF SAID OUTER MEMBERS ARE DISPOSED TRANSVERSELY ADJACENT THE CORRESPONDING HINGE MEANS OF SAID INNER MEMBERS, SAID OUTER MEMBERS BEING ADAPTED FOR LONGITUDINAL MOVEMENT WITH RESPECT TO SAID INNER MEM-
Claim 2
Dependent Claim
108 words
A FOLDING LADDER COMPRISING A PLURALITY OF HINGEDLY INTERCONNECTED LADDER SECTIONS, SAID SECTIONS EACH INCLUDING A PAIR OF SPACED RAILS CONNECTED BY A PLURALITY OF RUNGS, SAID RAILS HAVING AN OUTER RAIL MEMBER CONTAINING A RIGID SLIDABLE CAPTURED INNER RAIL MEMBER, HINGE MEANS CONNECTING THE PROXIMATE END PORTIONS OF SAID ALIGNED RAIL MEMBERS, SAID INNER AND OUTER RAIL MEMBERS BEING OF SUCH A LENGTH TO PERMIT ACCORDION LIKE FOLDING OF SAID SECTIONS INTO JUXTAPOSITION WHEN SAID HINGE MEANS OF SAID OUTER MEMBERS ARE DISPOSED TRANSVERSELY ADJACENT THE CORRESPONDING HINGE MEANS OF SAID INNER MEMBERS, SAID OUTER MEMBERS BEING ADAPTED FOR LONGITUDINAL MOVEMENT WITH RESPECT TO SAID INNER MEM-
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |