First sun-dimming experiment will test a way to cool Earth
Researchers plan to spray sunlight-reflecting particles into the stratosphere, an approach that could ultimately be used to quickly lower the planet’s temperature.
https://www.nature.com/articles/d41586-018-07533-4
The team is philanthropically funded, and they "strongly discourage" the commercialization of solar geoengineering technology in order to ensure a necessary level of transparency for informed public decision-making. They will file no patents related to the technology.
While the SCoPEx team hopes their findings can help to build more informed public and academic debate on the topic of solar geoengineering, critics argue that any attention garnered by the nascent science is a distraction from a real global effort to cut greenhouse gases.
https://www.dezeen.com/2018/12/11/first-solar-geoengineering-experiment/
https://keith.seas.harvard.edu/blog/why-i-am-proud-commercialize-direct-air-capture-while-i-oppose-any-commercial-work-solar
Geoengineering and Weather Modification Patents
patents from 1891-2014
https://climateviewer.com/2014/03/24/geoengineering-weather-modification-patents/