Method of determining the bulk strength of strata
CA 1161573 A · Owner: Coal Industry (Patents) Limited · Inventors: Mellor, David W.; Whitworth, Keith R.; Halker, Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CASE 4288/4382, ABSTRACT OF THE INVENTION "A METHOD OF DETERMINING THE BULK STRENGTH OF STRATA" The bulk rock strength of strata is determined by logging a borehole with an instrument to obtain a Neutron-Neutron log or a Hydrogen Index log of the hole and determining from the log in conjunction with the lithology of the strata the strength of the strata rocks by apply ing an inverse relation formula.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 31, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 31, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.