Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 4732620 | Thermoelement comprising a graphite/boron carbide thermocouple The invention is an improved theroelement which comprises a graphite/boron carbide thermocouple, the arms of which are constructed as a tube and a rod, arranged concentrically inside the tube, which are electrically connected at one end. One of the arms o... | 03/22/1988 |
| 4634640 | Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for their manufacture by isostatic hot-pressing The invention is a shaped article of boron nitride having a density of at least 95% of the theoretical density which consists of polycrystalline hexagonal boron nitride in the form of a homogeneous isotropic microstructure and which has been manufactured ... | 01/06/1987 |
| 4564601 | Shaped polycrystalline silicon carbide articles and isostatic hot-pressing process The invention is substantially pore-free shaped articles which consist essentially of polycrystalline - or ଲ-silicon carbide in the form of a single-phase homogeneous microstructure having grain sizes not exceeding 8 μm, and which are manufa... | 01/14/1986 |
| 4560668 | Substantially pore-free shaped articles of polycrystalline silicon carbide, and a process for their manufacture by isostatic hot-pressing The invention is substantially pore-free shaped articles consisting essentially of polycrystalline silicon nitride and polycrystalline silicon carbide in the form of a homogeneous microstructure having grain sizes of not more than 10 μm manufactured from... | 12/24/1985 |
| 4528120 | Refractory, electrically conductive, mixed materials containing boron nitride and process for their manufacture The invention is refractory, electrically conductive, mixed materials based on hexagonal boron nitride and at least one electrically conductive component such as titanium boride and zirconium boride, and having a density of at least about 95% of the theor... | 07/09/1985 |
| 4524138 | Substantially pore-free sintered polycrystalline articles of -silicon carbide, boron carbide and free carbon and process for their manufacture The invention provides substantially pore-free sintered polycrystalline articles comprising -silicon carbide, boron carbide and free carbon, the quantitative proportions of which, in percent by weight, are defined by the trapezoidal area having, in... | 06/18/1985 |
| 4495123 | Dense shaped articles consisting of polycrystalline hexagonal boron nitride and process for their manufacture by isostatic hot pressing The invention is a shaped article of boron nitride having a density of at least 95% of the theoretical density which consists of polycrystalline hexagonal boron nitride in the form of a homogeneous isotropic microstructure and which has been manufactured ... | 01/22/1985 |
| 4381931 | Process for the manufacture of substantially pore-free shaped polycrystalline articles by isostatic hot-pressing in glass casings The invention relates to a process for the manufacture of substantially pore-free shaped articles of polycrystalline material such as aluminium oxide, titanium boride, silicon nitride or silicon carbide, in which pulverulent materials or preformed article... | 05/03/1983 |
| 4351858 | Process for the manufacture of substantially pore-free shaped polycrystalline articles by isostatic hot-pressing The invention is a process for the manufacture of substantially pore-free shaped articles from polycrystalline material, such as tungsten carbide, silicon nitride, titanium boride or silicon carbide, in which encased articles preformed from pulverulent ma... | 09/28/1982 |
