US3568925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing increased rainfall in coastal regions
Assignee: ARTHUR C LIETZER
•
Filing: 1968-08-08
•
Granted: 1971-03-09
•
Expires: 1988-08-08
Abstract
Abstract A method of producing increased rainfall in coastal regions by spreading a thin layer of solar radiation absorbing material over a large surface area of the sea adjacent the coastal region to increase heat absorption at the water surface and evaporation of water when the prevailing weather direction is from the sea to the land, to thereby produce increased rainfall on the target land area.
Inventors
- 👤 Arthur C Lietzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:55
CPC Classifications
A; A01; A01G; A01G15/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A method for producing rainfall in coastal regions comprising: spreading a thin layer of solar radiation absorbing material over a large surface area of the sea adjacent the coastal region to increase heat absorption at the water surface and evaporation of water when the prevailing weather direction is from the sea to the land, said solar radiation absorbing material comprising carbonblack formed in finely divided particles supportable on the water surface by surface tension, spread with a surface density in the range 1 to 4 grams per square meter.
Claim 2
Independent Claim
89 words
A method for producing rainfall in coastal regions comprising: spreading a thin layer of solar radiation absorbing material over a large surface area of the sea adjacent the coastal region to increase heat absorption at the water surface and evaporation of water when the prevailing weather direction is from the sea to the land, said solar radiation absorbing material comprising carbonblack formed in finely divided particles supportable on the water surface by surface tension, spread with a surface density in the range 1 to 4 grams per square meter.
Claim 3
Dependent Claim
40 words
A method for producing rainfall as set forth in claim 1 comprising the additional step of seeding clouds formed by the evaporated water passing from the large surface area of the sea to the land with water condensing nucleating particles.
Claim 4
Independent Claim
82 words
A method for producing rainfall in coastal regions comprising: burning oil products in minimum amounts of oxygen adjacent a coastal region; emitting the smoke from said burning at low levels over the surface of the sea with minimum turbulence so that the smoke particles settle out onto a large surface area of the sea, to thereby increase heat absorption at the water surface and evaporation of water during daylight hours when the prevailing weather direction is from the sea to the land.
Claim 5
Independent Claim
82 words
A method for producing rainfall in coastal regions comprising: burning oil products in minimum amounts of oxygen adjacent a coastal region; emitting the smoke from said burning at low levels over the surface of the sea with minimum turbulence so that the smoke particles settle out onto a large surface area of the sea, to thereby increase heat absorption at the water surface and evaporation of water during daylight hours when the prevailing weather direction is from the sea to the land.
Claim 6
Dependent Claim
27 words
A method for producing rainfall as set forth in claim 3 wherein the burning of the oil products and the emitting of smoke are performed at night.
Claim 7
Independent Claim
113 words
A method for producing rainfall in coastal regions comprising: spreading a thin layer of solar radiation absorbing material over a first large surface area of the sea adjacent a coastal region to increase heat absorption at the water surface and evaporation of water; spreading a thin layer of solar radiation absorbing material over a second large surface area of the sea spaced from said first large surface area a distance sufficient to create turbulent air movement between the air volumes over said first and second large surface areas of the sea upon heat absorption at the water surface and evaporation of water in the first and second large surface areas of The sea.
Claim 8
Independent Claim
113 words
A method for producing rainfall in coastal regions comprising: spreading a thin layer of solar radiation absorbing material over a first large surface area of the sea adjacent a coastal region to increase heat absorption at the water surface and evaporation of water; spreading a thin layer of solar radiation absorbing material over a second large surface area of the sea spaced from said first large surface area a distance sufficient to create turbulent air movement between the air volumes over said first and second large surface areas of the sea upon heat absorption at the water surface and evaporation of water in the first and second large surface areas of The sea.
References Cited (Backward Citations)
US3409220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |