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 Title: |
US5003186:
Stratospheric Welsbach seeding for reduction of global warming
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Chang, David B.; Tustin, CA
Shih, I-Fu; Los Alamitos, CA
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| Assignee: |
Hughes Aircraft Company, Los Angeles, CA
other patents from HUGHES AIRCRAFT COMPANY (260265) (approx. 5,163)
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| Published / Filed: |
1991-03-26
/ 1990-04-23
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| Application Number: |
US1990000513145
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| IPC Code: |
Advanced:
A01G 15/00;
Core:
more...
IPC-7:
G21K 1/00;
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| U.S. Class: |
Current:
250/505.1;
244/158.1;
250/503.1;
250/504.R;
Original:
250/505.1;
250/504.R;
250/503.1;
244/158.R;
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| Field of Search: |
250/505.1,504 R,503.1,493.1
244/136,158 R
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| Priority Number: |
| 1990-04-23 |
US1990000513145 |
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| Abstract: |
A 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.
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| Attorney, Agent or Firm: |
Sales, Michael W. ;
Denson-Low, Wanda ;
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| Primary / Asst. Examiners: |
Berman, Jack I.;
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| INPADOC Legal Status: |
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| Family: |
None
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First Claim:
Show all 18 claims |
What is claimed is:
1. A method of reducing atmospheric warming due to the greenhouse effect resulting from a layer of gases in the atmosphere which absorb strongly near infrared wavelength radiation, comprising the step of dispersing tiny particles of a material within the gases' layer, the particle material characterized by wavelength-dependent emissivity or reflectivity, in that said material has high emissivities with respect to radiation in the visible and far infrared wavelength spectra, and low emissivity in the near infrared wavelength spectrum, whereby said tiny particles provide a means for converting infrared heat energy into far infrared radiation which is radiated into space.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 3 U.S. patent(s) that reference this one
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