BE536990A - - Google Patents

Info

Publication number: BE536990A
Authority: BE; Belgium

Application number

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1954-04-01

Publication of BE536990A publication Critical patent/BE536990A/xx

Classifications

- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

Landscapes

Engineering & Computer Science (AREA)
Mining & Mineral Resources (AREA)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Geology (AREA)
Lining And Supports For Tunnels (AREA)

BE536990D 1954-04-01 BE536990A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB959854A GB775180A (en)	1954-04-01	1954-04-01	Improvements in or relating to roof bars for use in underground mines

Publications (1)

Publication Number	Publication Date
BE536990A true BE536990A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=9875073

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE536990D BE536990A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)	1954-04-01

Country Status (3)

Country	Link
BE (1)	BE536990A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1)	FR1131903A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1)	GB775180A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

0
- BE BE536990D patent/BE536990A/xx unknown
1954
- 1954-04-01 GB GB959854A patent/GB775180A/en not_active Expired
1955
- 1955-04-01 FR FR1131903D patent/FR1131903A/fr not_active Expired

Also Published As

Publication number	Publication date
FR1131903A (fr)	1957-03-01
GB775180A (en)	1957-05-22

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