Method for determining the degree of change of material properties of underground strata
CA 1111542 A · Owner: Deutsche Texaco Aktiengesellschaft · Inventors: Helbig, Klaus; Pusch, Guenther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
METHOD FOR DETERMINING THE DEGREE OF CHANGE OF MATERIAL PROPERTIES OF UNDERGROUND STRATA (D#71,200-DTA-138-F), ABSTRACT OF THE DISCLOSURE A method of monitoring underground processes in which changes of material properties of underground strata occur in a limited area, especially in regard to in-situ combustions, gasifications in coal and petroleum deposits in order to localize and determine the degree of change of material properties of underground strata includes, emitting exactly reproducible time-sequential seismic signals in each geological strata where changes are expected to take place. The signals are recorded in the appropriate geological stratum at one or more positions or in the …
Read the whole patent
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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.