William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7429339 | Magnetic nanomaterials and synthesis method A magnetic nanoparticle (22), a magnetic nanomaterial (30), assembly (30), and a method for synthsising a magnetic nanoparticle, relating to thermodynamically stable and air stable ferromagnetic nanoparticles of adjustable aspect ratio made upon... | 09/30/2008 |
| 7422703 | Nanometer-sized up-converting phosphor fluoride particles and process of preparation Nanometer-scaled up-converting fluoride phosphor particles and processes of making them are disclosed. In the process, an aqueous solution consisting of soluble salts of rare-earth metal ions at a molar ratio of (yttrium, lanthanum or gadolinium): ytterbium:(erbium,... | 09/09/2008 |
| 7416911 | Electrochemical method for attaching molecular and biomolecular structures to semiconductor microstructures and nanostructures A method by which silicon nanostructures may be selectively coated with molecules or biomolecules using an electrochemical process. This chemical process may be employed as a method for coating many different nanostructures within a circuit, each with a different mo... | 08/26/2008 |
| 7378151 | Semiconductor nanoparticle, and a process of manufacturing the same The invention provides a semiconductor nanoparticle comprising a semiconductor nanoparticle core on the surface of which electron-releasing groups are arranged, the semiconductor nanoparticle having a fluorescent property and water-solubility. The invention also pro... | 05/27/2008 |
| 7368086 | Functionalized fluorescent nanocrystals, and methods for their preparation and use Functionalized fluorescent nanocrystal compositions and methods for making and using these compositions are disclosed. The compositions are fluorescent nanocrystals coated with at least one material. The coating material has chemical compounds or ligands with functi... | 05/06/2008 |
| 7318957 | Organic material-coated semiconductor nanoparticle with excellent durability, and method of manufacturing the same The resistance of a semiconductor nanoparticle provided with a surface treatment, such as an OH coating or ammonia treatment, against external factors is improved. A semiconductor nanoparticle provided with a surface treatment such as an OH coating or ammonia treatm... | 01/15/2008 |
| 7309525 | Inorganic nanocrystals with organic coating layer, their method of manufacture and materials constituted by said nanocrystals Nanocrystal comprising an inorganic core consisting of least one metal and/or at least one semi-conductor compound comprising at least one metal, the external surface of said nanocrystal being provided with an organic coating layer, consisting of at least one ligand... | 12/18/2007 |
| 7309875 | Nanocrystal protective layer for crossbar molecular electronic devices A molecular device is provided. The molecular device comprises a junction formed by a pair of crossed electrodes where a first electrode is crossed by a second electrode at a non-zero angle and at least one connector species including at least one switchable moiety ... | 12/18/2007 |
| 7303819 | Surface treatment of nanoparticles to control interfacial properties and method of manufacture A surface treated particle comprising a plurality of inorganic, metallic, semi-metallic, and/or metallic oxide particles and a star-graft copolymer with looped and/or linear polymeric structure on a star-graft copolymer, obtainable by a heterogeneous polymerization ... | 12/04/2007 |
| 7226953 | Nanocrystal/sol-gel nanocomposites The present invention is directed to solid composites including colloidal nanocrystals within a sol-gel host or matrix and to processes of forming such solid composites. The present invention is further directed to alcohol soluble colloidal nanocrystals useful in fo... | 06/05/2007 |
| 6649672 | Binding agents modified by nanoparticles for coating agents and use of the same Binders suitable for coating compositions, obtainable by reaction of one or more epoxy-functional binders with carboxyl-functional nanoparticles, and coating compositions containing them and the use thereof.... | 11/18/2003 |