Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Sample mechanical transport means in or for automated...
Reexamination Certificate
1998-09-22
2001-04-10
Alexander, Lyle A. (Department: 1743)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Sample mechanical transport means in or for automated...
C422S051000, C436S164000, C436S177000
Reexamination Certificate
active
06214291
ABSTRACT:
TECHNICAL FIELD
The present invention relates to test kits for determining the type of paint that has been previously applied to a surface.
BACKGROUND ART
This invention is directed to the problem of determining whether the paint applied to a painted surface is an oil based paint or latex based paint. It is important to know what type of paint has been previously applied so that a compatible paint can be used to cover prior coats or so that appropriate preparations can be performed to change to a different type of paint. Paints applied to surfaces may be light colored, such as white paint, or dark colored, such as brown or green.
Professional painters test painted surfaces by applying denatured alcohol to a rag and rubbing it on the surface. If paint residue appears on the rag it is determined that the paint is a latex based paint. If no paint residue appears on the rag, it is determined that the paint is an oil based paint. While this method is effective, the denatured alcohol can be spilled and different colored rags must be used for different colored paints. For example, if the painted surface to be tested is white and the painter uses a white rag for testing it can be difficult to see whether any paint has been removed.
There is presently a need for a simple, disposable test kit that will provide clear test results regardless of the color of the paint to be tested. The test kit should not be prone to spillage but should be economical and easy to use.
The present invention, as summarized and described in detail below, provides a solution to the above noted problems that is simple, safe, economical and effective.
DISCLOSURE OF THE INVENTION
According to the present invention, a test kit for testing paint on a painted surface is provided. The test kit includes a housing having an opening at one end. A liquid test reagent is contained within the housing. A swab is disposed in the opening of the housing substantially blocking the opening. A cap is removably secured to the housing to cover the swab when placed on the housing. The cap may be removed from the housing to reveal the swab. The test kit is used by removing the cap from the housing and rubbing the swab on the painted surface to test the composition of the surface.
According to one aspect of the invention, the swab preferably has at least two contrasting colored portions that form part of a single surface of the swab. The two contrasting colored portions may be different colors but most preferably are green and white. The swab may be formed in two separate portions or may be formed of a single portion that is dyed or colored at the end surface.
According to another aspect of the invention, the liquid test reagent is denatured alcohol. The denatured alcohol is preferably retained in a breakable glass vial until the test kit is ready to be used.
According to another aspect of the invention, the housing and cap are generally cylindrical in shape. The swab may also be a cylindrical member having a first semi-cylindrical portion formed of one color felt material and a second semi-cylindrical portion formed of a second contrasting color of felt.
These and other advantages and features of the invention will be better understood in view of the attached drawings and the following detailed description of a preferred embodiment of the paint test kit of the present invention.
REFERENCES:
patent: 3446596 (1969-05-01), Salivar et al.
patent: 5039618 (1991-08-01), Stone
patent: 5364792 (1994-11-01), Stone
patent: 5492835 (1996-02-01), Koenig
patent: 5550061 (1996-08-01), Stone
patent: 5558835 (1996-09-01), Kozarsky et al.
Alexander Lyle A.
Brooks & Kushman P.C.
Markegon L.L.C.
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