Patent US3288234A successfully refreshed from Google Patents.
US3288234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stair climbing conveyance
Assignee: Individual
•
Filing: 1964-08-17
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Granted: 1966-11-29
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jack M Feliz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:58
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/02; A61G5/021; A61G5/023; A61G5/024; A61G5/026; A61G5/066; A61G5/08; A61G5/0808; A61G5/085; A61G5/0891; B; B60; B60L; B60L50/00; B60L50/50; B60L50/60; B60L50/66; B62; B62D; B62D55/00; B62D55/06; B62D55/075; B60L2200/00; B60L2200/34; B60L2220/00; B60L2220/40; B60L2220/46; B60L2260/00; B60L2260/20; B60L2260/34; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70; Y10; Y10S; Y10S280/00; Y10S280/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A LOAD CARRYING CONVEYANCE, A PLATFORM TO RECEIVE THE LOAD; MAIN ENDLESS BELT TRACTOR MEANS SUPPORTING THE PLATFORM FOR MOBILITY; LEVER MEANS CARRYING AUXILIARY ENDLESS BELT TRACTOR MEANS DISPOSED ON PIVOTS FORWARDLY AND REARWARDLY ON THE PLATFORM AND OUTWARDLY OFF-SET FROM SAID MAIN TRACTOR MEANS AND PLATFORM TO BE OPERATIVELY CLEAR OF SAID MAIN TRACTOR MEANS AND PLATFORM TO PERMIT ROTATION OF SAID AUXILIARY TRACTOR MEANS WITHOUT INTERFERENCE CONTACT WITH SAID MAIN TRACTOR MEANS OR PLATFORM; POWER MECHANISM MANUALLY CONTROLLABLE BY AN OPERATOR FOR DRIVING THE SEVERAL TRACTOR MEANS; ROTATIONAL MEANS FOR ROTATING SAID SEVERAL LEVER MEANS CONCENTRICALLY POSITIONED WITH SAID PIVOTS AND MEANS FOR DRIVING SAID ROTATIONAL MEANS.
Claim 2
Dependent Claim
110 words
IN A LOAD CARRYING CONVEYANCE, A PLATFORM TO RECEIVE THE LOAD; MAIN ENDLESS BELT TRACTOR MEANS SUPPORTING THE PLATFORM FOR MOBILITY; LEVER MEANS CARRYING AUXILIARY ENDLESS BELT TRACTOR MEANS DISPOSED ON PIVOTS FORWARDLY AND REARWARDLY ON THE PLATFORM AND OUTWARDLY OFF-SET FROM SAID MAIN TRACTOR MEANS AND PLATFORM TO BE OPERATIVELY CLEAR OF SAID MAIN TRACTOR MEANS AND PLATFORM TO PERMIT ROTATION OF SAID AUXILIARY TRACTOR MEANS WITHOUT INTERFERENCE CONTACT WITH SAID MAIN TRACTOR MEANS OR PLATFORM; POWER MECHANISM MANUALLY CONTROLLABLE BY AN OPERATOR FOR DRIVING THE SEVERAL TRACTOR MEANS; ROTATIONAL MEANS FOR ROTATING SAID SEVERAL LEVER MEANS CONCENTRICALLY POSITIONED WITH SAID PIVOTS AND MEANS FOR DRIVING SAID ROTATIONAL MEANS.
References Cited (Backward Citations)
US2220890A
Cited
US2572910A
Cited
US2592025A
Cited
US2710659A
Cited
US2770310A
Cited
US2869686A
Cited
GB875691A
Cited
US3057319A
Cited
US3092200A
Cited
US3127188A
Cited
GB961370A
Cited
US3166138A
Cited
US3204716A
Cited
FR1363987A
Cited
US3191963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |