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˚˚ ˚ ˚:Title US5003186: Stratospheric Welsbach seeding for reduction of

global warming

:Derwent Title Reducing atmos. warming due to green effect - by dispersing near IC absorbing far IR emitting particles in stratosphere [ ]Derwent Record

:Country United States of AmericaUS

:Inventor ; Tustin, CA; Los Alamitos, CA

Chang, David B.Shih, I-Fu

HighResolution

L o w Resolution

6 p a g e s

˚

:Assignee , Los Angeles, CA other patents from (approx. 5,163)

Hughes Aircraft CompanyHUGHES AIRCRAFT COMPANY (260265)

News, Profiles, Stocks and More about this company

:Published / Filed / 1990-04-231 9 9 1 - 0 3 - 2 6

:Application

NumberU S 1 9 9 0 0 0 0 5 1 3 1 4 5

:IPC˚Code G 2 1 K 1 / 0 0 ;

:U.S. Class ; ; ;; ; ;

Current: ;2 5 0 / 5 0 5 . 1 244/158.R 250 /503 .1 250/504.ROriginal: ;2 5 0 / 5 0 5 . 1 250/504.R 250 /503 .1 244/158.R

:Field of Search 250/505.1,504 R,503.1,493.1 ,158 R2 4 4 / 1 3 6

:Priority Number 1990-04 -23 U S 1 9 9 0 0 0 0 5 1 3 1 4 5

: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.

:INPADOC

Legal˚StatusShow legal status actions

:Family None

:First Claim Show all 18 claims

A method of reducing atmospheric warming due to the greenhouse effect resulting from a layer of gases in the atmosphere which

What is claimed is: 1 .

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11.05.2004 14:58 UhrStratospheric Welsbach seeding for reduction of global warming (US5003186)

Page 1 of 2https://www.delphion.com/details?pn=US05003186__

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.

:Background˚/

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:Description Show description

:Forward

ReferencesShow 2 U.S. patent(s) that reference this one

˚˚ ˚ ˚:U.S. References | |

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PDF Patent P u b . D a t e Inventor Assignee T i t l e

*US3222675 1965-12 Schwartz

US4755673 1988-07Pollack et al.

Hughes Aircraft Company

Selective thermal radiators

* some details unavailable

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:Foreign

ReferencesNone

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11.05.2004 14:58 UhrStratospheric Welsbach seeding for reduction of global warming (US5003186)

Page 2 of 2https://www.delphion.com/details?pn=US05003186__