The Kraft Singles and Kraft Slices product lineup Kraft is renowned for are not entirely comprised of cheese. For this reason, Kraft cannot use the term “cheese” upon the product label within North America which is why these products are typically labeled as “Kraft Singles” or “Kraft Slices”. This is also the reason why Kraft Singles and Kraft Slices often display the phrase “pasteurized prepared cheese product” which is due to the fact that cheese within the North America must contain 51% cheese to be legally considered cheese and Kraft falls short of this threshold with these particular products
Between 1790 and 1880, all United States patents required a working model of the idea proposed prior to being patented. This requirement was phased out by the U.S. Congress in 1870, but the U.S. Patent Office continued to stipulate it as a requirement until 1880. The reason for the abolishment of this stipulation was that creating working prototypes was an expensive process and it was often difficult to find a tradesperson who could create the parts needed. This inconvenience slowed down the ability of inventors to acquire patents so that their product could be sold upon the open market. It was eventually agreed by the U.S. Congress as well as the U.S. Patent Office that this laborious process held up the release of inventions which could potentially make life easier for everybody and was therefore repealed