In one sentence, describe what the following article is about: For an inventor to claim to be protected by a patent, that patent must have been filed properly. You or your attorney may be able to do some research and find out that the patent was not, in fact, properly filed. This would give you a strong defense against the claim of patent infringement. Patents are not everlasting. After an inventor files a patent, and it is issued, the patent protection lasts for 20 years. If that time has expired, then the item is no longer protected, and you cannot be challenged or sued for using it. A patent can also expire or be terminated prematurely if the owner does not file annual maintenance fees with the U.S. Patent Office. To find out if this has happened, you can search on the website of the U.S. Patent Office. A patent provides protection against people who unlawfully use an inventor's design or invention. However, the scope of the protection is quite narrow. If you have invented, created or designed something similar, but sufficiently different from the original, then your use may not be prohibited by the patent. The concept of being "sufficiently different" is difficult to define. You may raise this as a defense, but if the patent owner disagrees, you may have to go to court to get a ruling.
Summary: Research the validity of the patent. Find out if the patent has expired. Argue that your item or invention is sufficiently different from the patented item.

After your patch has had an opportunity to set, carefully feel around the inside of the tire for any protruding foreign objects, such as metal wire, which may have caused the puncture. Take your repaired tube and carefully lay it in the hollow inside portion of the tire. This is usually easiest if you inflate the tube slightly and slide one side in first, then work the rest in as necessary. When you're done, double-check to make sure none of the tube is hanging out of the tire. Make sure the inflation valve is pointing inward (away from the tire) when you lay the tube in the tire so that you can eventually inflate the tube. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f3\/Patch-a-Bicycle-Tube-Step-9Bullet1-Version-3.jpg\/v4-459px-Patch-a-Bicycle-Tube-Step-9Bullet1-Version-3.jpg","bigUrl":"\/images\/thumb\/f\/f3\/Patch-a-Bicycle-Tube-Step-9Bullet1-Version-3.jpg\/aid301936-v4-728px-Patch-a-Bicycle-Tube-Step-9Bullet1-Version-3.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class="mw-parser-output"><p>License: <a rel="nofollow" class="external text" href="https:\/\/en.wikipedia.org\/wiki\/Fair_use">Fair Use<\/a> (screenshot)<br>
<\/p><\/div>"} Next, use your thumbs to slide the tire (which contains the partly-inflated tube) back onto the wheel. Press the outer lips of the tire over the metal lip of the wheel so that they "lock" securely in place, being careful not to pinch the tube between the tire and the rim. You may need to use your tire lever or prying tool to help you with the very last part of the tire, which can often be tricky to get over the lip of the wheel. Note that some high-end bike tires are meant to only turn in one direction. In this case, the intended direction of rotation will usually be indicated by small arrows on the walls of the tires. Don't install the tire backwards! This can reduce the bike's performance and cause the tire to wear improperly. Don't forget to take the valve lid off when replacing the tube in the wheel. The lidless inflation valve should slide through a circle-shaped hole in the wheel so that it can be easily accessed for pumping. Make sure the tube is not sticking out between the tire and the rim before you start to pump, or the tube might explode. Next, grab an automatic or hand-operated pump and start putting some air in your tire. Go gradually to allow the tube to shift and settle within the tire as it expands. When fully-inflated, give the tire a squeeze, let the bike sit for a few minutes, then squeeze the tire again. If it feels about as firm the second time as it did the first time, you're ready to ride! If you're worried about the tube settling improperly within the tube, feel free to inflate it before re-installing the tire on the wheel. Note, however, that this can make the tire trickier to get back on. You're nearly done all you've got to do now is slide the wheel back on the bike, secure the quick release or screw on the wheel nut, re-connect the brakes, and you're good to go (unless you've been working with your rear wheel, in which case you'll also need to carefully loop the chain around the gears again). Peddle cautiously until you feel confident that the patch won't immediately burst, then resume riding as you normally would! Inner tube patches, while handy, aren't necessarily meant to last you forever. These patches are great for getting you out of the woods when your tire blows and you have no replacement, but they don't offer a good long-term solution for a punctured inner tube. While good-quality patches can approach the reliability of a brand-new inner tube, others can leak for a time immediately after patching or may offer only temporary protection. There's no substitute for an actual replacement, so you may want to at least shop for a new inner tube when you get the chance so that you can have one handy if you suffer another flat in the near future.
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One-sentence summary -- Replace the tube in the tire. Work the tire and tube back onto the wheel. Inspect the bead and pump up the tube gradually to let the tube and tire settle. Replace the wheel on the bike. Consider buying a new tube when you can.

Problem: Article: On the rear of your Roomba there is a tray that fills with dirt and dust as it vacuums (also called the "bin"). Press the button on top of this tray and remove it. Dump the contents of this tray into the trashcan. You should be able to see a red semi-circle inside the tray (which may be covered with gray dirt and dust). This is your filter. This filter will easily slide out of the tray, while remaining attached on one end. Slide this out, and knock any loose dirt/dust off into the trashcan. Attach the crevice tool (the long, thin attachment) to the hose of a regular vacuum cleaner. Then turn the vacuum on and use this attachment to remove dirt and grime from the Roomba collection tray and filter. Remove the crevice tool from your vacuum hose, and instead attach the brush tool. Turn your vacuum back on and go over the filter and tray once again. This time, pay extra attention to the surface of the filter, the rubber seals, and the vents on the back of the tray. When you are finished, snap the filter back into place.
Summary:
Empty your Roomba. Remove the filter. Vacuum the tray and filter using a regular vacuum and the crevice tool. Switch to the brush tool.