Take your pick lol...
http://www.geoengineeringwatch.org/links-to-geoengineering-patents/
http://www.patentsencyclopedia.com/app/20110174892#ixzz1uJUMZJTG
http://www.geoengineeringwatch.org/links-to-geoengineering-patents/
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/228586/7936.pdf