US3340960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder
Assignee: Individual
•
Filing: 1965-12-13
•
Granted: 1967-09-12
•
Expires: 1985-12-13
Abstract
No abstract record available.
Inventors
- 👤 Louis F Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:37
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48; E06C1/00; E06C1/02; E06C1/34; E06C1/345; E06C1/38; E06C1/397; E06C7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN COMBINATION, A TRACK, SIDE RAILS CONNECTED BY RUNGS AND FORMING A LADDER, WITH A BODY AND NORMALLY HORIZONTAL AXLES ON WHICH WHEELS ARE TURNABLE AT THE LOWER END OF SAID LADDER AND ADAPTED TO TRAVEL ON SAID TRACK ALONG A LINE PARALLEL TO THE PLANE OF SAID SIDE RAILS, FLANGES UPSTAND FROM SAID TRUCK BODY, A PLATFORM OVERLYING SAID FLANGES, AND EXTENDING TO COVER SAID BODY AND ITS WHEELS, A SLEEVE THE LOWER END OF WHICH IS CONNECTED TO SAID PLATFORM AND WHICH OPENS UPWARDLY AND RECEIVES THE LOWER END PORTION OF A RAIL OF SAID LADDER, FLANGED DEPENDING FROM SAID PLATFORM AND INTERLEAVED WITH RESPECT TO SAID UPSTANDING FLANGES, AND A SINGLE ROD PASSING THROUGH ALL OF SAID INTERLEAVED FLANGES TO PIVOT THE LOWER END OF SAID LADDER TO SAID TRUCK BODY.
Claim 2
Dependent Claim
134 words
IN COMBINATION, A TRACK, SIDE RAILS CONNECTED BY RUNGS AND FORMING A LADDER, WITH A BODY AND NORMALLY HORIZONTAL AXLES ON WHICH WHEELS ARE TURNABLE AT THE LOWER END OF SAID LADDER AND ADAPTED TO TRAVEL ON SAID TRACK ALONG A LINE PARALLEL TO THE PLANE OF SAID SIDE RAILS, FLANGES UPSTAND FROM SAID TRUCK BODY, A PLATFORM OVERLYING SAID FLANGES, AND EXTENDING TO COVER SAID BODY AND ITS WHEELS, A SLEEVE THE LOWER END OF WHICH IS CONNECTED TO SAID PLATFORM AND WHICH OPENS UPWARDLY AND RECEIVES THE LOWER END PORTION OF A RAIL OF SAID LADDER, FLANGED DEPENDING FROM SAID PLATFORM AND INTERLEAVED WITH RESPECT TO SAID UPSTANDING FLANGES, AND A SINGLE ROD PASSING THROUGH ALL OF SAID INTERLEAVED FLANGES TO PIVOT THE LOWER END OF SAID LADDER TO SAID TRUCK BODY.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |