Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Reexamination Certificate
2000-06-01
2001-10-30
Carrillo, Sharidan (Department: 1746)
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
C134S002000, C134S003000, C134S022100, C134S022110, C134S028000, C134S036000, C134S041000, C134S042000, C510S119000, C510S245000
Reexamination Certificate
active
06309470
ABSTRACT:
REFERENCE TO MICROFICHE APPENDIX
This application is not referenced in any microfiche appendix.
BACKGROUND OF THE INVENTION
This invention relates generally to the cleaning of surfaces having deposits and more particularly, to the removal of particular types of deposits formed along these surfaces. Such surfaces are located along internal surfaces of drink water tanks, supply water wells, water filter and distributor water lines.
Typically these surfaces are constantly being exposed to water and air. For example, the water level of a drink water tank rises and falls with demand. This constant change between water exposure and air exposure cause a biological film, such as algae and microorganisms, along with incrustations such as calcium, iron and manganese to form deposits along these surfaces.
Cleaning these deposits from these surfaces has been the subject of a number of prior art compositions. U.S. Pat. No. 4,199,469 issued to Waltzer on Apr. 22, 1980 discloses a composition and method for cleaning drink water tanks. This composition utilizes a group of acids (ascorbic, formic, phosphoric, citric and hydrochloric).
Once the surfaces have been cleaned by a cleaning composition, a disinfectant is normally applied. This additional process adds time and resources to the overall cleaning process. Given the number of constituents the composition is complicated and confusing. Therefore, there exists a need for a more simple composition in order to clean surfaces having deposits contained thereon.
BRIEF SUMMARY OF THE INVENTION
This invention relates generally to the cleaning of surfaces having deposits and more particularly, to the removal of particular types of deposits formed along these surfaces. Such surfaces can be located along internal surfaces of drink water tanks, supply water wells, water filter systems, and distributor water lines.
The present invention is directed, generally, to a composition for such surfaces. The composition includes in combination a cleaning solution portion and a disinfectant portion.
The cleaning solution portion generally includes hydrochloric acid and/or phosphoric acid in combination with inhibitors, dyes and water. The disinfectant is a standard disinfectant, such as but not limited to hydrogen peroxide or peracidic acid.
The composition is applied to the surfaces having deposits of biological film, such as but not limited to algae and microorganisms and/or incrustations such as but not limited to calcium, iron and manganese thereon. The solution loosens the adhesion between the deposits and the surface at which time the composition and deposits are rinsed away. Further, the biological film is reliably eliminated.
It is a primary object of the invention to provide a composition and method for cleaning surfaces that avoids the problems mentioned above.
Another object of the invention is to provide a solution for cleaning and disinfecting such surfaces.
Other objects and further scope of the applicability of the present invention will become apparent from the detailed description to follow wherein like parts are designated by like reference numerals.
REFERENCES:
patent: 4199469 (1980-04-01), Walzer
patent: 4780150 (1988-10-01), Anderson
patent: 4851149 (1989-07-01), Carandang
patent: 4885136 (1989-12-01), Katayama et al.
patent: 5280042 (1994-01-01), Lopes
patent: 6051108 (2000-04-01), O'Neal, Jr.
Written Opinion for PCT/US00/14949, filed Jun. 01, 2000.
Schaal Christian
Schulhoff Jeffrey
Capehart Brent A.
Carrillo Sharidan
Gable & Gotwals
Water Whole International, Inc.
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