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Current content: 157 117 910 patent documents

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139 301 new documents added

1 340 825 documents amended

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EP 0956322 A4 19991215 -

Publication

EP 0956322 A4 19991215

Application

EP 96934168 A 19961015

Priority

US 9616352 W 19961015

Abstract (en)

[origin: CA2266624A1] This invention concerns a corrosion-inhibitor nominally comprised of a phenolic compound and a hydroxide-bearing compound capable of imparting a pH of 9 to water, the inclusion thereof in aerated water-based fluids and foams, and the use of these fluids in wellbore applications; particularly applications conducted at elevated temperatures.

IPC 1-7

C09K 7/00

IPC 8 full level

C23F 11/06 (2006.01); E21B 43/22 (2006.01)

Citation (search report)

[X] US 4376867 A 19830315 - JANSEN GERT [DK], et al
[A] US 4089789 A 19780516 - MUZYCZKO THADDEUS M, et al
See references of WO 9816592A1

Designated contracting state (EPC)

DOCDB simple family (publication)

CA 2266624 A1 19980423; EP 0956322 A1 19991117; EP 0956322 A4 19991215

DOCDB simple family (application)

CA 2266624 A 19961015; EP 96934168 A 19961015