From the beginning of Weather Modification to Aerosol Campaigns using Nanofibers and more:

Partial list of weather modification patents registered:
1338343 - April 27, 1920 - Process And Apparatus For The Production of Intense Artificial Clouds, Fogs, or Mists
1619183 - March 1, 1927 - Process of Producing Smoke Clouds From Moving Aircraft
1631753 - June 7, 1927 - Electric Heater - Referenced in 3990987
1665267 - April 10, 1928 - Process of Producing Artificial Fogs
1892132 - December 27, 1932 - Atomizing Attachment For Airplane Engine Exhausts
1928963 - October 3, 1933 - Electrical System And Method
1957075 - May 1, 1934 - Airplane Spray Equipment
2097581 - November 2, 1937 - Electric Stream Generator - Referenced in 3990987
2409201 - October 15, 1946 - Smoke Producing Mixture
2476171 - July 18, 1945 - Smoke Screen Generator….
2480967 - September 6, 1949 - Aerial Discharge Device
2550324 - April 24, 1951 - Process For Controlling Weather
2510867 - October 9, 1951 - Method of Crystal Formation and Precipitation
2582678 - June 15, 1952 - Material Disseminating Apparatus For Airplanes
2591988 - April 8, 1952 - Production of TiO2 Pigments - Referenced in 3899144
2614083 - October 14, 1952 - Metal Chloride Screening Smoke Mixture
2633455 - March 31, 1953 - Smoke Generator
2688069 - August 31, 1954 - Steam Generator - Referenced in 3990987
2721495 - October 25, 1955 - Method And Apparatus For Detecting Minute Crystal Forming Particles Suspended in a Gaseous Atmosphere
2730402 - January 10, 1956 - Controllable Dispersal Device
2801322 - July 30, 1957 - Decomposition Chamber for Monopropellant Fuel - Referenced in 3990987
2881335 - April 7, 1959 - Generation of Electrical Fields
2908442 - October 13, 1959 - Method For Dispersing Natural Atmospheric Fogs And Clouds
2986360 - May 30, 1962 - Aerial Insecticide Dusting Device
2963975 - December 13, 1960 - Cloud Seeding Carbon Dioxide Bullet
3126155 - March 24, 1964 - Silver Iodide Cloud Seeding Generator…
3456880 - July 22, 1969 - Method Of Producing Precipitation From The Atmosphere
3518670 June 30, 1970 - Artificial Ion Cloud
3534906 - October 20, 1970 - Control of Atmospheric Particles
3545677 - December 8, 1970 - Method of Cloud Seeding
3564253 - February 16, 1971 - System And Method For Irradiation Of Planet Surface Areas
3587966 - June 28, 1971 - Freezing Nucleation
3601312 - August 24, 1971 - Methods of Increasing The Likelihood oF Precipatation By The Artificial Introduction Of Sea Water Vapor Into The Atmosphere Winward Of An Air Lift Region
3608810 - September 28, 1971 - Methods of Treating Atmospheric Conditions
3608820 - September 20, 1971 - Treatment of Atmospheric Conditions by Intermittent Dispensing of Materials Therein
3613992 - October 19, 1971 - Weather Modification Method
3630950 - December 28, 1971 - Combustible Compositions For Generating Aerosols, Particularly Suitable For Cloud Modification And Weather Control And Aerosolization Process
USRE29142 - This patent is a reissue of patent US3630950 - Combustible compositions for generating aerosols, particularly suitable for cloud modification and weather control and aerosolization process
3659785 - December 8, 1971 - Weather Modification Utilizing Microencapsulated Material
3666176 - March 3, 1972 - Solar Temperature Inversion Device
3677840 - July 18, 1972 - Pyrotechnics Comprising Oxide of Silver For Weather Modification Use
3722183 - March 27, 1973 - Device For Clearing Impurities From The Atmosphere
3769107 - October 30, 1973 - Pyrotechnic Composition For Generating Lead Based Smoke
3784099 - January 8, 1974 - Air Pollution Control Method
3785557 - January 15, 1974 - Cloud Seeding System
3795626 - March 5, 1974 - Weather Modification Process
3808595 - April 30, 1974 - Chaff Dispensing System
3813875 - June 4, 1974 - Rocket Having Barium Release System to Create Ion Clouds In The Upper Atmopsphere...
4402480 - September 6, 1983 - Atmosphere modification satellite
4412654 - November 1, 1983 - Laminar microjet atomizer and method of aerial spraying of liquids
4415265 - November 15, 1983 - Method and apparatus for aerosol particle absorption spectroscopy
4470544 - September 11, 1984 - Method of and Means for weather modification
4475927 - October 9, 1984 - Bipolar Fog Abatement System
4600147 - July 15, 1986 - Liquid propane generator for cloud seeding apparatus
4633714 - January 6, 1987 - Aerosol particle charge and size analyzer
4643355 - February 17, 1987 - Method and apparatus for modification of climatic conditions….
6315213 - November 13, 2001 - Method of modifying weather
6382526 - May 7, 2002 - Process and apparatus for the production of nanofibers
6408704 - June 25, 2002 - Aerodynamic particle size analysis method and apparatus
6412416 - July 2, 2002 - Propellant-based aerosol generation devices and method
6520425 - February 18, 2003 - Process and apparatus for the production of nanofibers

From Nanofibers to Nanotechnology:
http://www.nano.gov/html/facts/nanoapplicationsandproducts.html
Scientists are examining the potential for nanosilver, which is known to have anti-microbial properties, to clean up oil spills and other hazardous chemicals in the environment.

http://www.nano.gov/html/centers/nnicenters.html
Nanoscale transistors may someday lead to computers that are faster, more powerful and more energy efficient than those used today. Nanotechnology also holds the potential to exponentially increase information storage capacity; soon your computer’s entire memory will be able to be stored on a single tiny chip.

SEC. 1. SHORT TITLE.
“America COMPETES Reauthorization Act of 2010”
TITLE I—SCIENCE AND TECHNOLOGY POLICY
Subtitle A—National Nanotechnology Initiative Amendments
Sec. 101. Short title. – “National Nanotechnology Initiative Amendments Act of 2010.”
Sec. 102. National nanotechnology program amendments. – Modifies the NNI strategic plan to include the specification of: (1) near and long term objectives, (2) the timeframe for achieving near term objectives, (3) the metrics for measuring progress toward objectives, and (4) multi-agency funded projects in areas of significant economic and societal impacts authorized under section 105. Requires the National Nanotechnology Coordination Office (NNCO) to (1) develop a public database for projects funded under the Environmental, Health and Safety (EHS), Education and Societal Dimensions, and Nanomanufacturing program component areas; (2) develop, maintain and publicize information about NNI supported nanotechnology facilities available for use by academia and industry; (3) to report annually on its current and future budget requirements. Revises the charge to the National Academy of Sciences’ National Research Council for the content and scope of the triennial reviews of the NNI Program.
FUNDING
Extends Authorization of Appropriations for Fiscal Years 2011 through 2015:
(A) $300,000,000 for fiscal year 2011
(B) $450,000,000 for fiscal year 2012
(C) $600,000,000 for fiscal year 2013
(D) $800,000,000 for fiscal year 2014
(E) $1,000,000,000 for fiscal year 2015