Patent US3333893A successfully refreshed from Google Patents.
US3333893A
Expired / Lapsed
US
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Earth strata differentiating device
Assignee: Union Carbide Corp
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Filing: 1965-07-27
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Granted: 1967-08-01
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Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 John W Heimaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:10
CPC Classifications
E; E21; E21C; E21C39/00; E21C35/00; E21C35/24; E21C35/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
AN EARTH STRATA DIFFERENTIATING DEVICE FOR MINING AND TUNNELING MACHINES HAVING EARTH STRATA CUTTING MEANS MOUNTED THEREON COMPRISING, IN COMBINATION, ILLUMINATING MEANS MOUNTED IN PROXIMITY TO SAID EARTH STRATA CUTTING MEANS FOR LIGHTING A POINT ON THE SURFACE CUT BY SAID EARTH STRATA CUTTING MEANS, MEANS RESPONSIVE TO CHANGES IN THE INTENSITY OF LIGHT REFLECTED FROM SAID POINT MOUNTED ADJACENT SAID ILLUMINATING MEANS FOR CONVERTING SAID CHANGES TO ELECTRICAL SIGNALS, MEANS FOR CONVERTING SAID ELECTRICAL SIGNALS TO AN OPERATOR CONTROL STATION, AND INDICATING MEANS LOCATED AT SAID OPERATOR CONTROL STATION ADAPTED TO RESPOND TO SAID ELECTRICAL SIGNALS, WHEREBY THE LIGHT REFLECTING ABILITY OF SAID SURFACE IS CONTINUOUSLY INDICATED AT SAID OPERATOR CONTROL STATION.
Claim 2
Dependent Claim
113 words
AN EARTH STRATA DIFFERENTIATING DEVICE FOR MINING AND TUNNELING MACHINES HAVING EARTH STRATA CUTTING MEANS MOUNTED THEREON COMPRISING, IN COMBINATION, ILLUMINATING MEANS MOUNTED IN PROXIMITY TO SAID EARTH STRATA CUTTING MEANS FOR LIGHTING A POINT ON THE SURFACE CUT BY SAID EARTH STRATA CUTTING MEANS, MEANS RESPONSIVE TO CHANGES IN THE INTENSITY OF LIGHT REFLECTED FROM SAID POINT MOUNTED ADJACENT SAID ILLUMINATING MEANS FOR CONVERTING SAID CHANGES TO ELECTRICAL SIGNALS, MEANS FOR CONVERTING SAID ELECTRICAL SIGNALS TO AN OPERATOR CONTROL STATION, AND INDICATING MEANS LOCATED AT SAID OPERATOR CONTROL STATION ADAPTED TO RESPOND TO SAID ELECTRICAL SIGNALS, WHEREBY THE LIGHT REFLECTING ABILITY OF SAID SURFACE IS CONTINUOUSLY INDICATED AT SAID OPERATOR CONTROL STATION.
References Cited (Backward Citations)
US3019338A
Cited
US3294449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |