Patent US3159924A successfully refreshed from Google Patents.
US3159924A
Expired / Lapsed
US
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Ladder inclinometer
Assignee: Individual
•
Filing: 1961-11-20
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Granted: 1964-12-08
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Lieblein George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN INCLINOMETER FOR ANGULARLY POSITING A LADDER, COMPRISING A SUPPORTING PLATE OF GENERALLY PARALLELOGRAM SHAPE HAVING UPPER AND LOWER GENERALLY HORIZONTAL EDGES AND A PAIR OF ANGULARLY INCLINED INTERCONNECTING SIDE EDGES, SAID SIDE EDGES BEING DISPOSED IN PARALLEL RELATION TO ONE ANOTHER AND AT AN ANGLE TO SAID UPPER AND LOWER EDGES CORRESPONDING GENERALLY TO A PREDETERMINED ANGLE AT WHICH IT IS DESIRED TO POSITION SAID LADDER RELATIVE TO HORIZONTAL, MEANS DEFINING AN ELONGATED CAVITY ADJACENT TO AND EXTENDING ALONG ONE OF SAID HORIZONTAL EDGES OF SAID SUPPORTING PLATE, BUBBLE LEVEL MEANS CARRIED BY SAID SUPPORTING PLATE WITHIN SAID CAVITY ADJACENT AND GENERALLY PARALLEL TO SAID ONE OF SAID GENERALLY HORIZONTAL EDGES AND ADAPTED TO INDICATE A DESIRED LEVEL POSITION WHEN SAID UPPER AND LOWER EDGES ARE HORIZONTAL AND WHEN SAID INTERCONNECTING SIDE EDGES ARE THEREBY AT SAID PREDETERMINED ANGLE TO HORIZONTAL, SAID CAVITY DEFINING MEANS INCLUDING BOTH VERTICALLY AND HORIZONTALLY EXTENDING STRUCTURAL MEMBERS FOR HOLDING SAID BUBBLE LEVEL MEANS IN PREDETERMINED FIXED POSISUPPORTING PLATE, AND A PAIR OF RESILIENTLY MOVABLE SIDE
Claim 2
Dependent Claim
172 words
AN INCLINOMETER FOR ANGULARLY POSITING A LADDER, COMPRISING A SUPPORTING PLATE OF GENERALLY PARALLELOGRAM SHAPE HAVING UPPER AND LOWER GENERALLY HORIZONTAL EDGES AND A PAIR OF ANGULARLY INCLINED INTERCONNECTING SIDE EDGES, SAID SIDE EDGES BEING DISPOSED IN PARALLEL RELATION TO ONE ANOTHER AND AT AN ANGLE TO SAID UPPER AND LOWER EDGES CORRESPONDING GENERALLY TO A PREDETERMINED ANGLE AT WHICH IT IS DESIRED TO POSITION SAID LADDER RELATIVE TO HORIZONTAL, MEANS DEFINING AN ELONGATED CAVITY ADJACENT TO AND EXTENDING ALONG ONE OF SAID HORIZONTAL EDGES OF SAID SUPPORTING PLATE, BUBBLE LEVEL MEANS CARRIED BY SAID SUPPORTING PLATE WITHIN SAID CAVITY ADJACENT AND GENERALLY PARALLEL TO SAID ONE OF SAID GENERALLY HORIZONTAL EDGES AND ADAPTED TO INDICATE A DESIRED LEVEL POSITION WHEN SAID UPPER AND LOWER EDGES ARE HORIZONTAL AND WHEN SAID INTERCONNECTING SIDE EDGES ARE THEREBY AT SAID PREDETERMINED ANGLE TO HORIZONTAL, SAID CAVITY DEFINING MEANS INCLUDING BOTH VERTICALLY AND HORIZONTALLY EXTENDING STRUCTURAL MEMBERS FOR HOLDING SAID BUBBLE LEVEL MEANS IN PREDETERMINED FIXED POSISUPPORTING PLATE, AND A PAIR OF RESILIENTLY MOVABLE SIDE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |