Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1996-09-09
2001-04-24
Gupta, Yogendra (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S239000, C510S403000, C510S426000, C510S488000, C510S506000
Reexamination Certificate
active
06221823
ABSTRACT:
This application claims priority from provisional from Great Britain Application 9521829.3 filed Oct. 25, 1995 and Great Britain Application 9612645.3 filed Jun. 17, 1996.
The present invention relates to improvements in cleaning compositions. More particularly the present invention is directed to improved cleaning compositions which find particular use in hard surface cleaning applications.
Cleaning compositions are commercially important products and enjoy a wide field of utility in assisting in the removal of dirt and grime from surfaces, especially those characterized as useful with “hard surfaces”. Hard surfaces are those which are frequently encountered in lavatories such as lavatory fixtures such as toilets, shower stalls, bathtubs, bidets, sinks, etc., as well as countertops, walls, floors, etc. In such lavatory environment various forms of undesirable residues are known to form including hard water stains as well as “soap scum stains”. Hard water stains are mineral stains caused by the deposition of salts, such as calcium or magnesium salts, frequently present in hard water; soap scum stains are residues of fatty acid soaps such as soaps which are based on alkaline salt of low fatty acids, which fatty acids are known to precipitate in hard water due to the presence of metal salts therein leaving an undesirable residue upon such surfaces. Various formulations in compositions of cleaning agents have been produced and are known to the art which cleaning agents are generally suited for one type of stain but not necessarily for both classes of stains. For example, it is known to the art that highly acidic cleaning agents comprising strong acids, such as hydrochloric acids, are useful in the removal of hard water stains. However, the presence of strong acids is known to be an irritant to the skin and further offers the potential of toxicological danger. Other classes of cleaning compositions and formulations are known to be useful upon soap scum stains, however, generally such compositions comprise an organic and/or inorganic acid, one or more synthetic detergents from commonly recognized classes such as those described in U.S. Pat. No. 5,061,393; U.S. Pat. No. 5,008,030; U.S. Pat. No. 4,759,867; U.S. Pat. No. 5,192,460; U.S. Pat. No. 5,039,441. Generally, the compositions described in these patents are claimed to be effective in the removal of soap scum stains from such hard surfaces and may find further limited use in other classes of stains. However, the formulations of most of the compositions within the aforementioned patents generally have relatively high amounts of acids (organic and/or inorganic) which raises toxicological concerns, and further none of the above patents provide any disinfecting properties.
Compositions are known to the art which do provide disinfection and sanitization through the use of certain classes of anionic surfactants coupled with an acidic component such as that described in U.S. Pat. No. 5,143,720. However, the compositions in this U.S. patent would not be expected nor are believed to provide any significant cleaning benefit and thus would not be particularly effective in the removal of residues, particularly hard water stains and soap scum stains.
Thus, it is among the objects of the invention to provide improved cleaning compositions which are effective in providing a disinfecting effect and facilitate in the removal of soap scum stains and hard water stains, especially from hard surfaces.
It is a further object of the invention to provide improved cleaning compositions which provide the benefits of low toxicity, and hard water stain removal and soap scum stain removal.
It is a still further object of the invention to provide improved cleaning compositions which are particularly effective in hard water stain removal and soap scum stain removal, and which further features minimal irritability to the eyes, skin or mucocus tissues of a consumer.
It is yet a further object of the invention to provide a readily pourable and readily pumpable cleaning composition which features the benefits described above.
It is a further object of the invention to provide a process for the improvement of the simultaneous cleaning and sanitization of hard surfaces, which process comprises the step of: providing a cleaning composition as outlined above, and applying an effective amount to a hard surface requiring such treatment.
These and other objects of the invention shall be more apparent from a reading of the specification and of the claims attached.
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Crisanti Michael George
Kline Gary Peter
Lu Robert Zhong
Manzo Robert Paul
Fish & Richardson P.C.
Gupta Yogendra
Reckitt Benckiser , Inc.
Webb Gregory E.
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