A chemical patent, pharmaceutical patent or drug patent is a patent for an invention in the chemical or pharmaceuticals industry. Strictly speaking, in...

patent 0,147,313 – Chemical Telegraphs U.S. patent 0,147,314 – Circuits for Chemical Telegraphs U.S. patent 0,147,917 – Duplex Telegraphs U.S. patent...

of patents. Particular types of patents for inventions include biological patents, business method patents, chemical patents and software patents. Although...

more) free valence(-s) at a carbon atom. The term is often used in chemical patent literature to protect claims over a broad scope.[citation needed] Acetonyl...

business, patent trolling or patent hoarding is a categorical or pejorative term applied to a person or company that attempts to enforce patent rights against...

the same chemical substance as a drug that was originally protected by chemical patents. Generic drugs are allowed for sale after the patents on the original...

nostrums were actually patented; chemical patents did not come into use in the United States until 1925. Furthermore, patenting one of these remedies would...

A software patent is a patent on a piece of software, such as a computer program, libraries, user interface, or algorithm. A patent is a set of exclusionary...

chemistry, a chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or...

patent for using carbon tetrachloride (CTC, or CCl4) to extinguish fires. The liquid vaporized and extinguished the flames by inhibiting the chemical...