US3285015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining apparatus
Assignee: Individual
•
Filing: 1962-11-19
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Granted: 1966-11-15
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Carnegie James
- 👤 Thomas David Gurney Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:11
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/12; E21D23/14; E21D23/146
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
ROOF SUPPORT CONTROL APPARATUS ADAPTED TO CONTROL A ROOF SUPPORT ASSEMBLY WHICH INCLUDES A SERIES OF ADVANCEABLE ROOF SUPPORTS AT LEAST SOME OF WHICH HAVE ASSOCIATED THEREWITH CONVEYOR ADVANCING MEANS, THE CONTROL APPARATUS COMPRISING: SELECTING MEANS COUPLED WITH SAID SUPPORTS AND OPERABLE TO SEQUENTIALLY SELECT THE ROOF SUPPORTS FOR AN ADVANCING OPERATION AND TO SIMULTANEOUSLY WITH EACH ROOF SUPPORT SELECTION SELECT FOR OPERATION A CONVEYOR ADVANCING MEANS ASSOCIATED WITH A NONSELECTED ROOF SUPPORT, WHEREBY THE CONVEYOR IS AUTOMATICALLY ADVANCED AT A POSITION FURTHER ALONG THE WORKING FACE FROM A ROOF SUPPORT WHICH IS BEING ADVANCED.
Claim 2
Dependent Claim
95 words
ROOF SUPPORT CONTROL APPARATUS ADAPTED TO CONTROL A ROOF SUPPORT ASSEMBLY WHICH INCLUDES A SERIES OF ADVANCEABLE ROOF SUPPORTS AT LEAST SOME OF WHICH HAVE ASSOCIATED THEREWITH CONVEYOR ADVANCING MEANS, THE CONTROL APPARATUS COMPRISING: SELECTING MEANS COUPLED WITH SAID SUPPORTS AND OPERABLE TO SEQUENTIALLY SELECT THE ROOF SUPPORTS FOR AN ADVANCING OPERATION AND TO SIMULTANEOUSLY WITH EACH ROOF SUPPORT SELECTION SELECT FOR OPERATION A CONVEYOR ADVANCING MEANS ASSOCIATED WITH A NONSELECTED ROOF SUPPORT, WHEREBY THE CONVEYOR IS AUTOMATICALLY ADVANCED AT A POSITION FURTHER ALONG THE WORKING FACE FROM A ROOF SUPPORT WHICH IS BEING ADVANCED.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |