Patent US667836A successfully refreshed from Google Patents.
US3339968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle loading ramp
Assignee: National Manufacturing Co Inc
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Filing: 1966-09-29
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Granted: 1967-09-05
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 John B Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:02
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/43; B60P1/435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A VEHICLE HAVING A CARGO CARRYING BOX WITH A FLOOR, TWO SIDES AND A HINGEDLY MOUNTED GATE ADAPTED TO SWING FROM A CLOSED, UPRIGHT POSITION DOWNWARDLY ABOUT AN AXIS ADJACENT THE EDGE OF SAID FLOOR TO AN OPEN POSITION TO PERMIT ACCESS TO SAID BOX, THE COMBINATION COMPRISING: FIRST AND SECOND RAMP PANELS PIVOTALLY AFFIXED TO ONE ANOTHER PROXIMATE ADJACENT EDGES THEREOF; STOP MEANS FOR LIMITING THE PIVOTAL MOVEMENT OF SAID PANELS WITH RESPECT TO ONE ANOTHER WHEN THEY HAVE BEEN PIVOTED FROM A RETRACTED POSITION WITH THEIR LOWER SURFACES LYING GENERALLY ADJACENT TO AN EXTENDED POSITION WHEREIN THE UPPER SURFACES OF SAID PANELS FORM A CONTINUOUS, GENERALLY PLANAR RAMP SURFACE; AND
Claim 2
Dependent Claim
113 words
IN A VEHICLE HAVING A CARGO CARRYING BOX WITH A FLOOR, TWO SIDES AND A HINGEDLY MOUNTED GATE ADAPTED TO SWING FROM A CLOSED, UPRIGHT POSITION DOWNWARDLY ABOUT AN AXIS ADJACENT THE EDGE OF SAID FLOOR TO AN OPEN POSITION TO PERMIT ACCESS TO SAID BOX, THE COMBINATION COMPRISING: FIRST AND SECOND RAMP PANELS PIVOTALLY AFFIXED TO ONE ANOTHER PROXIMATE ADJACENT EDGES THEREOF; STOP MEANS FOR LIMITING THE PIVOTAL MOVEMENT OF SAID PANELS WITH RESPECT TO ONE ANOTHER WHEN THEY HAVE BEEN PIVOTED FROM A RETRACTED POSITION WITH THEIR LOWER SURFACES LYING GENERALLY ADJACENT TO AN EXTENDED POSITION WHEREIN THE UPPER SURFACES OF SAID PANELS FORM A CONTINUOUS, GENERALLY PLANAR RAMP SURFACE; AND
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |