"cooperation extended" is a correct and usable phrase in written English.
It means that someone has offered or provided cooperation to another person or group. Example: The two companies were able to successfully complete the project thanks to the cooperation extended by their respective teams.
Secret cooperation extended to the secluded sites where nations tested their handiwork in thundering blasts.
The spirit of cooperation extended to competition Friday during the dirt-jumping finals at the Dew Tour.
After every inspection, United Nations officials in Baghdad have noted the cooperation extended to the inspectors by the Iraqis.
Especially when his cooperation extended to eating a spoonful of mock brains out of a plastic head.
This direct thrust value identified gives a clear picture on the level of cooperation extended by a mobile μsc node to their neighbour.
This refinement of the scope of duties of 'international assistance and cooperation' extended our understanding beyond the more general statement in article 2(1) of the ICESCR which failed to distinguish sufficiently between national and international obligations.
That cooperation extends to other government agencies, too.
Through my research I discovered that this tripartite cooperation extends far beyond functional food, and has created some unique programs and educational opportunities across the life sciences.
The international community of scientists may help to abolish war by setting an example to the world of practical cooperation extending across barriers of nationality, language, and culture.
The company declined to say whether that cooperation extends to its work with Unaoil.
The cooperation has extended to allowing a 40-man Marine antiterrorist squad deployed from Bahrain to patrol inside a government-owned harborside hotel where most of the American team members are staying, wearing desert-style camouflage uniforms and carrying automatic rifles.
