Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Reexamination Certificate
2000-04-10
2001-05-22
Carrillo, Sharidan (Department: 1746)
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
C134S002000, C134S022170, C134S022190, C134S022180, C134S029000, C134S030000, C134S034000, C134S042000, C510S199000, C510S378000, C510S421000
Reexamination Certificate
active
06235124
ABSTRACT:
BACKGROUND
Mildew growth on interior surfaces of aircraft, particularly military aircraft has been a chronic problem, particularly when these aircraft are operated in humid climates. Excess buildup of mildew can cause corrosion as well as operational damage to aircraft. Mildew can also cause accelerated degradation of paint and decals. Mildew buildup is also a health hazard to pilots and maintenance personnel. Buildup of mildew causes unpleasant odors and can be demoralizing to pilots, maintenance personnel and passengers.
Current methods of mildew removal have proven to be extremely time consuming and often inadequate. Solutions that adequately removed mildew in the past have caused accelerated corrosion to the aircraft structural metals as well as to the aircraft. Other solutions, such as ones containing sodium hypochlorite (chlorine bleach), are damaging to the environment and may only bleach the mildew stain and not remove it. Certain solutions require many ingredients, which are difficult, potentially dangerous and time consuming to prepare and use. Other solutions are expensive as well as difficult and dangerous to store.
For the foregoing reasons, there is a need for a new method and solution for mildew removal. Information relevant to attempts to address these problems can be found in U.S. Pat. Nos. 4,097,395, 4,164,477, 4,533,487 and 5,602,090 (None of these patents are admitted to be prior art with respect to the present invention.) However, each of these references suffers from one of the above listed disadvantages.
SUMMARY
The present invention is directed to a chemical compound and method that satisfies the needs enumerated above and below.
The instant invention is directed to a solution for mildew removal which comprises of an aqueous solution of 1-2%(weight by volume) of sodium perborate and a non-ionic detergent added as a surfactant.
The present invention is also directed to a method for mildew removal which comprises of mixing sodium perborate in an aqueous solution, wherein the sodium perborate is 1-2% weight by volume, then adding a non-ionic detergent and applying the solution to an area infected with mildew, and then rinsing the infected area.
It is an object of the present invention to provide a solution and method for mildew removal that is inexpensive, easy to store and environmentally friendly. Sodium perborate is a colorless, free flowing granular chemical that is easy to store and use. The solution decomposes into water, oxygen and sodium borate. It is also non-corrosive to common aircraft structural material.
It is also an object of the invention to provide a solution and method for mildew removal that is non-corrosive to aluminum, steel and aircraft structural materials. The solution may actually inhibit corrosion by passivating metal surfaces and increasing the life of various materials. The solution and method may also possibly delay the growth of mildew on aircraft. The solution may also be used on cars, trucks, trains, ships, buildings or any other object that needs removal of mildew.
It is a further object of the invention to provide a method and solution, which provides mildew cleaning, bleaching, and stain removal. The cleaner also works to enhance removal of common operational oils and soils as well as the removal of mildew.
It is also an object of the present invention to provide a solution that breaks down protein channels within the fungus (mildew), thus eliminating its presence, not just bleaching the stain.
It is also an object of the invention to reduce cleaning time of aircraft. Current methods require significant cleaning time and can cause delays in having the aircraft available for use. The present invention has shown to decrease cleaning time.
These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims.
REFERENCES:
patent: 4097395 (1978-06-01), Posey et al.
patent: 4164477 (1979-08-01), Whitley
patent: 4533487 (1985-08-01), Jones
patent: 4975109 (1990-12-01), Friedman, Jr. et al.
patent: 5000868 (1991-03-01), Wittpenn, Jr. et al.
patent: 5256182 (1993-10-01), Friedman, Jr. et al.
patent: 5320805 (1994-06-01), Kramer et al.
patent: 5545349 (1996-08-01), Kurii et al.
patent: 5567247 (1996-10-01), Hawes et al.
patent: 5602090 (1997-02-01), Melikyan et al.
patent: 5605578 (1997-02-01), Hawes et al.
patent: 5783550 (1998-07-01), Kuriyama et al.
patent: 5959104 (1999-09-01), Arbogast et al.
patent: 6159391 (2000-12-01), Kobayashi et al.
patent: WO 96/06911 (1996-03-01), None
patent: WO 98/07815 (1998-02-01), None
Military Specification for MIL-D-16791G, pp. 1-19, Jan. 1990.
Carrillo Sharidan
Glut Mark O.
The United States of America as represented by the Secretary of
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