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View Images US5071569: Method and composition for water treatment

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Inventor(s): Caulfield; Paul R. , Wadsworth, IL
Schueneman; James R. , Wadsworth, IL

Applicant(s): Coral International, Inc., Waukegan, IL
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Issued/Filed Dates: Dec. 10, 1991 / March 22, 1990

Application Number: US1990000497261

IPC Class: C02F 1/76;

Class: Current: 210/754; 210/764; 210/765; 210/917;
Original: 210/754; 210/764; 210/765; 210/917;

Field of Search: 210/696,698,754,757,764,765,917 134/22.16,22.19,28

Legal Status: NewShow legal status actions

Abstract: A method is disclosed for decolorizing a water body particularly for clarifying the water and removing algae stains in a swimming pool, by establishing in the water body EDTA compound and ammonium ions by the addition of appropriate compounds, and a composition for decolorizing such a water body containing EDTA compound and ammonium salt.

Attorney, Agent, or Firm: Lydig, Voit & Mayer;

Primary/Assistant Examiners: Silverman; Stanley S.; Shideler; Krisanne

Family: NewShow 7 known family members

           

U.S. References:
  (No patents reference this one)
Patent   Issued   Inventor(s) Applicant(s)   Title
US3201311* 8 /1965 Antonides et al.    
US4108790 8 /1978 Foroulis  Exxon Research & Engineering Co. Corrosion inhibitor
US4353866 10 /1982 Wong  The Procter & Gamble Company Activation of hypochlorite bleaching of dyes
US4596891 6 /1986 van Gilse et al.  Duphar International Research B.V. Diamines having algicidal activity
US4614595 9 /1986 Azzarella et al.  Coral, Inc. Method of water treatment
US4846979 7 /1989 Hamilton   Algacide and method for treatment of water
  * some details unavailable


           
First Claim: Show all 14 claims

What is claimed is:
    1. A method for removing algae from a water body comprising establishing in the water body a concentration of EDTA compound of at least about 0.15 ppm and a concentration of ammonium ions up to about 2 ppm and then filtering the water.


Background/Summary: Show background/summary

Drawing Descriptions: Show drawing descriptions

Description of Preferred Embodiments: Show description of preferred embodiments

Foreign References:
Publication Country Date IPC Class
FR02011920 France 3 /1970  
JP04627835 Japan 8 /1971  
GB01281545 United Kingdom 7 /1972  
GB02197861 United Kingdom 6 /1988  


Other References:

Article info links by
ISI logo
:
  • T. A. Wojtowicz et al., "Water (treatment of Pools, Spas, Hot Tubs") in Kirk-Othmer Encyclopedia of Chemical Technology (3rd ed.), vol. 24, pp. 427-441 (1984).


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