HUGHES PATENT FOR
STRATOSPHERIC SEEDING
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US5003186: "Stratospheric Welsbach seeding for reduction of global warming"
Inventor(s): Chang; David B. , Tustin, CA
Shih; I-Fu , Los Alamitos, CA
Applicant(s): Hughes Aircraft Company, Los Angeles, CA
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Issued/Filed Dates: March 26, 1991 / April 23, 1990
Application Number: US1990000513145
IPC Class: G21K 1/00;
Class: Current: 250/505.1; 244/158.R; 250/503.1; 250/504.R;
Original: 250/505.1; 250/504.R; 250/503.1; 244/158.R;
Field of Search: 250/505.1,504 R,503.1,493.1 244/136,158 R
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.
Attorney, Agent, or Firm: Sales; Michael W.; Denson-Low; Wanda; Primary/Assistant Examiners:
Berman; Jack I.;
U.S. References: Show the 2 patents that reference this one Patent Issued Inventor(s) Applicant(s) Title
US3222675* 12 /1965 Schwartz
US4755673 7 /1988 Pollack et al. Hughes Aircraft Company Selective thermal radiators
* some details unavailable
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.