`A Portable Multi-Strainer (11)` for a kitchen sink comprising a filter screen (14) having a top and bottom surface, a top grid (12) having openings therein abutting the top surface of the filter screen (14), a bottom grid (15) having openings therein abutting the bottom surface of the filter screen (14), said strainer (11) being sized to cover the entire bottom of said kitchen sink and having a thin edge (18) border (17) adapted for a tight fit to the walls of said sink. The top grid (12) openings therein comprise numerous cells (13) all having top and bottom openings. Cells' (13) bottom openings abutting the top surface of the filter screen (14), `coinciding` with the bottom grid's (15) openings abutting the bottom surface of the filter screen (14), resulting with all cells (13) functioning as many individual strainers, having waste particles retaining inside the cells (13) as water drains through filter screen (14) and the bottom grid's (15) openings. Present invention (11) has feet (16) extending from the underside of the bottom grid (15) without blocking bottom grid's (15) openings; the feet (16) provides air-space between the filter screen (14) and the sink bottom. The top grid (12) with the cells' (13) top openings, keep present invention's (11) top surface clean upon which to place objects.

BACKGROUND
 1. Field of Invention
 This invention relates to sink-drain strainers, specifically to such
 strainers which help keep chemical-waste out of our nation's waterways.
 2. Description of Prior Arts
 Today many sink-drain outlets contain a removable perforated cup to prevent
 waste particles from entering and clogging the drainpipe. But the
 perforated cup alone is not adequate, it continuously gets clogged with
 waste particles causing blockage of the drain. This necessitates the
 repeated removal of the perforated cup, causing sink-water and
 waste-particles together to flow down the drain, resulting in waste
 particles continuously clogging the drainpipes.
 There are several brands of chemicals on the market which are used to
 unclog, or to keep from clogging, sink drainpipes. Consumers pour these
 chemicals into their sink-drainpipes. Nationwide, the use of these
 chemicals produces many gallons of chemical-waste, most of which are
 ending up in our streams and rivers and polluting our waterways.
 Inventors have created several types of sink-drain devices to prevent
 waste-particles from clogging the sink-drainpipes. For example:
 U.S. Pat. No. 1,976,549 to Foose (1934) `Drain Fixture For Sinks`: shows a
 stopper and strainer, designed to be connected to a drainpipe.
 U.S. Pat. No. 2,285,833 to Platt (1942) `Disposable Drain Strainer`: shows
 a disposable waste strainer cup of flexible material fitted in the sink
 drain-outlet.
 U.S. Pat. No. 3,509,587 to Fins (1970) `Sink Strainer Body Assembly`:
 relates to a sink strainer of the type mounted in the discharge outlet of
 a sink.
 U.S. Pat. No. 3,813,708 to Hamburg (1974) `Kitchen Sink and Drain Bowl
 Unit`: shows a drain bowl fastened within the drain opening of a kitchen
 sink.
 U.S. Pat. No. 4,045,351 to Peterson (1977) `Sink Strainer Device`: shows an
 elongated cylinder is mounted beneath the sink in communication with the
 opening. The cylinder contains a holder with a disposable strainer therein
 and is removable for exchange through an opening in an end of the
 cylinder. Once every week or two the disposable strainer with dirt and
 sewage collected therein is removed and disposed in the garbage, then a
 new disposable strainer is installed in the holder in the cylinder.
 U.S. Pat. No. 4,164,796 to Sakow (1979) `Sink Strainer Assembly`: Connect
 the strainer assembly to the plumbing system.
 U.S. Pat. No. 4,232,407 to Williams (1980) `Basket Strainer And Stopper
 Assembly For Sinks`: shows a basket strainer located in sink drain-outlet.
 U.S. Pat. No. 4,692,948 to Martin (1987) `Sink Strainer Having A Magnet`: a
 basket strainer is operatively mounted in the strainer body, located in
 sink drain-outlet.
 U.S. Pat. No. 5,165,118 to Ceadrowski (1992) `Sink Strainer Assembly With
 Snap Lock`: having a lower portion connected to a drain.
 U.S. Pat. No. 5,369,815 to Martin (1994) `Sink Strainer Having A Detachable
 Seal`: a basket strainer is operatively mounted in the strainer body,
 located in the sink drain outlet.
 U.S. Pat. No. 5,418,983 to Garguillo (1995) `Decorative Color Changeable
 Basket Sink Strainer`: shows strainer body installed between the sink and
 the waste pipe.
 NEVERTHELESS, the above prior-art inventions have a number of
 disadvantages:
 The invention having a disposable strainer inside a cylinder: U.S. Pat. No.
 4,045,351:
 a) Manufacture of the cylinder and its installation to the drainpipe
 beneath the sink can be very expensive.
 b) Cutting into a drainpipe to install the above cylinder increases the
 risk of developing water leakage.
 c) Collecting dirt and sewage in a cylinder for a week or two can develop a
 bad odor and bacteria.
 d) Forgetting to remove the dirt-filled disposable strainer from the
 cylinder results in repeatedly clogged sink drain-outlets.
 e) Many of the above prior-art inventions have one thing in common: They
 have placed their inventions `inside` the sink's drain-outlet, which
 demands the disposal of the waste-particles `after` the waste particles
 entered the sink's drain-outlet.
 However, `Logic` reveals the simplest method of preventing sink drainpipes
 from clogging is to trap and dispose of sink waste-particles `before` they
 reach the drain-outlet. I base my present invention `A Portable
 Multi-Strainer` on this simple logic as described in this patent
 application.
 My `Portable Multi-Strainer` provides a device which traps waste-particles
 before they reach the sink-drain outlet, resulting in sink drainpipes kept
 free from clogging. This is accomplished without cutting into the
 drainpipes and without the use of chemicals.
 OBJECTS AND ADVANTAGES
 The objects and advantages of my Portable Multi-Strainers as described in
 this patent application are:
 a) to provide a portable sink-drain strainer having numerous strainers
 per-sink.
 b) to provide a sink-drain strainer that is portable, and its numerous
 strainers cover the entire sink bottom, including the sink drain-outlet:
 From which derives it title, `A Portable Multi-Strainer`.
 c) to provide a sink-drain strainer having numerous strainers all working
 in unison trapping and keeping waste particles from entering the sink
 drain-outlet and clogging the drainpipe.
 d) to provide a sink-drain strainer which is durable, simple in
 construction and inexpensive to manufacture. It has no moving parts, needs
 no electric power, is portable, and needs no tools to install or remove.
 Still further objects and advantages will become apparent from the
 consideration of the ensuing description and drawings.

REFERENCE NUMBERS IN DRAWINGS
 11. Portable Multi-Strainer (present invention)
 12. Top grid
 13. Top grid's depth
 14. Filter-screen
 15. Bottom grid
 16. Raised feet on underside of the bottom grid
 17. Border
 18. Border's thinned edge for tight fit in sink
 19. (Sink)
 SUMMARY
 The Portable Multi-Strainer (present invention) comprises a filter-screen
 placed between the top grid and the bottom grid, from which derives
 numerous strainers per-sink.
 DESCRIPTION: FIGS. 1 to 6
 The typical embodiment of the present invention (11) is illustrated in FIG.
 1 (side view), and FIG. 2 (top view). Present invention (11) covers the
 entire sink-bottom (19), including the sink-drain outlet (FIG. 2), thus
 keeping the sink and the drain clean simultaneously.
 Present invention (11) comprises the filter-screen (14) placed between the
 top grid (12) and the bottom grid (15) FIGS.1, and 5. The numerous
 openings in the top grid (12) and the bottom grid (15) with the
 filter-screen (14) positioned in-between (12, 14, 15) form into numerous
 strainers FIG. 2, trapping and preventing waste particles from entering
 the drain-outlet and clogging the drainpipe: FIGS. 1, and 5.
 From the surface of the top grid (12) FIG. 2 down to the filter-screen (14)
 derives the depth (13) of the numerous strainers FIG. 3 in which the
 sink's waste-particles are trapped.
 On the underside of the bottom grid (15) are `raised feet` (16) FIG. 4
 forming `air spaces` beneath the numerous strainers FIG. 1 thereby the
 water flows freely through the strainers, the air-spaces, on to the
 sink-bottom (19) and down the drain clear of all waste-particles FIG. 1.
 Plus, the `raised feet` (16) FIG. 4 will help support the weight of the
 objects placed on the numerous strainers (11) FIG. 1.
 Present invention's (11) border (17) has a thinned edge (18) for a tight
 fit in the sink (19) FIG. 2, which prevents waste-particles from passing
 under the border's (17) edge (18) and clogging the drainpipe FIGS. 1, 2,
 and 5. Present invention (11) being portable is easily and quickly taken
 out of the sink-bottom (19) cleaned of waste-particles, and returned back
 on its (11) feet (16) in sink-bottom (19) ready to use again. FIGS. 1, and
 2.
 The top grid (12) FIG. 2 with its depth (13) FIG. 3, and the bottom grid
 (15) with its raised feet (16) FIG. 4, and border (17) with its thinned
 edge (18) FIGS. 1, and 5, are made of PVC (polyvinyl chloride) or made of
 any durable material available. The filter-screen (14) is of stainless
 steel or fiberglass or any durable material available. The Portable
 Multi-Strainer's measurements are according to the various sinks'
 workloads, and sizes, used in the various homes and businesses.
 From the description above a number of advantages of the Portable
 Multi-Strainer become evident:
 a) it provides a sink-drain strainer which does not require chemicals to
 keep sink drainpipes from clogging. This saves consumers thousands of
 dollars in the cost of the Chemicals, and plumbing repairs to unclog sink
 drainpipes
 b) it provides a sink-drain strainer which does not require cutting into
 the sink-drain outlets, or drainpipes, to install. This saves consumers
 thousands of dollars in the cost of installation, and plumbing repairs
 should water-leakage occur due to the installations.
 c) it provides a `ready to use` product, requiring no assembling of parts
 by the consumer and no complicated instructions to operate.
 OPERATION FIGS. 1 to 6
 Present invention (11) is a ready to use product having Eno moving parts
 and needs no electric power. FIGS. 1, and 2. To operate it (11) requires
 only, to place it (11) on its feet (16) FIG. 4 in sink-bottom FIGS. 1, and
 2.
 To clean present invention (11) requires only to take it (11) out of the
 sink (19) hold it (11) `face down` and shake the waste-particles out of
 the numerous strainers on to an old newspaper. Throw out newspaper with
 waste-particles. Then wash present invention (11) and return it (11) back
 on its feet (16) to sink-bottom (19) and it (11) is ready to use again,
 FIGS. 1, and 2.
 Thus, present invention (11) is simple to use and quick and easy to clean.
 SUMMARY, RAMIFICATIONS, AND SCOPE
 The reader will see that this invention can be used easily, conveniently,
 and without damage or disturbance to sink-drain outlet, drainpipe, or the
 sink-bottom.
 In addition, the Portable Multi-Strainer can be made in many shapes, such
 as square, circular, rectangular, etc. according the needs of the Market
 Place. Also, the depth of the strainers can be as deep as needed for the
 various homes and businesses, accordingly.
 Furthermore, the Portable Multi-Strainer (present invention) has additional
 advantages in that:
 a) it is user friendly, simple to use, quick and easy to clean, has no
 moving parts, need not electric power to operate, and being portable needs
 no tools to install or remove.
 b) it is simple in construction and Inexpensive to manufacture, thus it is
 economical, cost-efficient, and attractive to investors, individual
 consumers, and specific companies.
 Nationwide, more utilization of present invention will occur, resulting
 with an increasing number of sink-drainpipes kept free from clogging
 without the use of chemicals. The use of these chemicals produce many
 gallons of chemical-waste most of which are ending up in our streams and
 rivers and polluting our waterways.
 Nationwide, the invention in this patent application will help reduce the
 need to use these chemicals, resulting in less chemical-waste ending up in
 our streams and rivers and polluting our waterways. Thus our water quality
 will be maintained and will gradually be restored due to national
 self-purification.
 CHAIN REACTION
 1. Present invention will reduce the need for drainpipe cleaning chemicals.
 2. Less chemicals will reduce the chemical-waste ending up in our streams
 and rivers and polluting our waterways.
 3. Less chemical-waste will reduce the taxes needed to clean the polluted
 waterways.
 4. Less taxes will reduce the struggles our people have.
 Although the description above contains many specifics, these should not be
 construed as limiting the scope of the invention but as merely providing
 illustrations of some of the present advantages of this invention.
 The scope of this invention should be determined by the appended claims and
 their legal equivalents, rather than by the examples given.