Stratospheric Welsbach seeding for reduction of global warming
Patent 5003186 Issued on March 26, 1991. Estimated Expiration Date: 
April 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3222675 Selective thermal radiators Patent #: 4755673 InventorsApplicationNo. 513145 filed on 04/23/1990US Classes:250/505.1, RADIATION CONTROLLING MEANS250/503.1, With radiation modifying member250/504RUltraviolet or infrared sourceExaminersPrimary: Berman, Jack I.Attorney, Agent or FirmInternational ClassG21K 001/00AbstractA method is described for reducing atmospheric or global warming resulting from the presence of heat-trapping gases in the atmosphere, i.e., from the greenhouse effect. Such gases are relatively transparent to sunshine, but absorb strongly the long-wavelength infrared radiation released by the earth. The method incudes the step of seeding the layer of heat-trapping gases in the atmosphere with particles of materials characterized by wavelength-dependent emissivity. Such materials include Welsbach materials and the oxides of metals which have high emissivity (and thus low reflectivities) in the visible and 8-12 micron infrared wavelength regions. | |
