Patent US3331577A successfully refreshed from Google Patents.
US3331577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article support for a ladder
Assignee: Individual
•
Filing: 1965-09-03
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Granted: 1967-07-18
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Expires: 1985-09-03
Abstract
No abstract record available.
Inventors
- 👤 Grunwaldt Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:10
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
AN ARTICLE SUPPORT FOR MOUNTING ON AND BETWEEN A PAIR OF SPACED STEPS OR RUNGS ON A SUBSTANTIALLY UPRIGHT LADDER, COMPRISING: A PAIR OF SUBSTANTIALLY PLANAR MEMBERS HINGEDLY CONNECTED TO EACH OTHER ALONG ONE EDGE OF EACH; FIRST GRIPPING MEANS ON ONE OF SAID PLANAR MEMBERS INTERMEDIATE THE ONE EDGE THEREOF AND THE OPPOSITE EDGE THEREOF ENGAGEABLE WITH A STEP FOR POSITIVELY OPPOSING RELATIVE TRANSVERSE MOVEMENT THEREOF IN A HORIZONTAL DIRECTION; SECOND GRIPPING MEANS ON THE OTHER ONE OF SAID PLANAR MEMBERS RELEASABLY ENGAGEABLE WITH A SECOND STEP SPACED FROM SAID FIRST STEP, SAID SECOND GRIPPING MEANS BEING ADJUSTABLE WITH RESPECT TO SAID OTHER PLANAR MEMBER; AND COOPERATING LOCKING MEANS ON SID OTHER PLANAR MEMBER AND SAID SECOND GRIPPING MEANS FOR HOLDING SAME IN SELECTED RELATIVE POSITIONS WHEREBY ENGAGEMENT OF SAID GRIPPING MEANS WITH A PAIR OF SPACED STEPS WILL HOLD SAID PLANAR MEMBERS IN POSITIONS SUBSTANTIALLY PERPENDICULAR TO EACH OTHER.
Claim 2
Dependent Claim
151 words
AN ARTICLE SUPPORT FOR MOUNTING ON AND BETWEEN A PAIR OF SPACED STEPS OR RUNGS ON A SUBSTANTIALLY UPRIGHT LADDER, COMPRISING: A PAIR OF SUBSTANTIALLY PLANAR MEMBERS HINGEDLY CONNECTED TO EACH OTHER ALONG ONE EDGE OF EACH; FIRST GRIPPING MEANS ON ONE OF SAID PLANAR MEMBERS INTERMEDIATE THE ONE EDGE THEREOF AND THE OPPOSITE EDGE THEREOF ENGAGEABLE WITH A STEP FOR POSITIVELY OPPOSING RELATIVE TRANSVERSE MOVEMENT THEREOF IN A HORIZONTAL DIRECTION; SECOND GRIPPING MEANS ON THE OTHER ONE OF SAID PLANAR MEMBERS RELEASABLY ENGAGEABLE WITH A SECOND STEP SPACED FROM SAID FIRST STEP, SAID SECOND GRIPPING MEANS BEING ADJUSTABLE WITH RESPECT TO SAID OTHER PLANAR MEMBER; AND COOPERATING LOCKING MEANS ON SID OTHER PLANAR MEMBER AND SAID SECOND GRIPPING MEANS FOR HOLDING SAME IN SELECTED RELATIVE POSITIONS WHEREBY ENGAGEMENT OF SAID GRIPPING MEANS WITH A PAIR OF SPACED STEPS WILL HOLD SAID PLANAR MEMBERS IN POSITIONS SUBSTANTIALLY PERPENDICULAR TO EACH OTHER.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |