Patent JPS5742801A successfully refreshed from Google Patents.
US3136534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine tram
Assignee: Individual
•
Filing: 1961-10-02
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Granted: 1964-06-09
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 William S Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:09
CPC Classifications
E; E21; E21D; E21D11/00; E21D11/40; E21D15/00; E21D15/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A MINE TRAM COMPRISING A VEHICLE HAVING A PAIR OF PARALLEL ENDLESS TRACKS TO SUPPORT AND TRANSPORT IT ON A MINE FLOOR, A PAIR OF SAFETY BARS EXTENDING LONGITUDINALLY OF SAID VEHICLE OVER SAID ENDLESS TRACKS, A PAIR OF UPWARDLY EXTENDABLE JACKS, EACH SAID JACK SUPPORTING ONE SAID SAFETY BAR, A PAIR OF UPWARDLY EXTENDABLE JACKS AND A PAIR OF DOWNWARDLY EXTENDABLE JACKS AT ONE END OF SAID VEHICLE BEYOND SAID ENDLESS TRACKS, SAID DOWNWARDLY EXTENDABLE JACKS ENGAGING THE MINE FLOOR WHILE SAID UP-
Claim 2
Dependent Claim
84 words
A MINE TRAM COMPRISING A VEHICLE HAVING A PAIR OF PARALLEL ENDLESS TRACKS TO SUPPORT AND TRANSPORT IT ON A MINE FLOOR, A PAIR OF SAFETY BARS EXTENDING LONGITUDINALLY OF SAID VEHICLE OVER SAID ENDLESS TRACKS, A PAIR OF UPWARDLY EXTENDABLE JACKS, EACH SAID JACK SUPPORTING ONE SAID SAFETY BAR, A PAIR OF UPWARDLY EXTENDABLE JACKS AND A PAIR OF DOWNWARDLY EXTENDABLE JACKS AT ONE END OF SAID VEHICLE BEYOND SAID ENDLESS TRACKS, SAID DOWNWARDLY EXTENDABLE JACKS ENGAGING THE MINE FLOOR WHILE SAID UP-
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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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |