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 |
| 4014704 | Insulating refractory fiber composition and articles for use in casting ferrous metals An insulating composition useful for riser sleeves, hot tops, ladle liners, and the like articles for use in casting of molten ferrous metal is described. The composition comprises 30% to 50% refractory fiber, 1% to 35% granular silicon carbide, inorganic... | 03/29/1977 |
| 4013746 | Methods of manufacture of semiconductor bodies A method of manufacture of a semiconductor pellet of an electric surface-discharge igniter of a gas-turbine engine begins with a mixture of 60% by weight silicon-carbide particles of 600 British Standard Mesh size, and 40% by weight of powdered alumino-si... | 03/22/1977 |
| 3998646 | Process for forming high density silicon carbide High density sintered silicon carbide articles are formed by first forming a green blank or billet out of powdered silicon carbide, heat treating the billet to cause it to lightly sinter and become partially densified, shaping the billet to the desired fi... | 12/21/1976 |
| 3966855 | Method of fabricating silicon carbide articles A method is provided for fabricating silicon carbide articles which comprises hot pressing a homogeneous mixture of carbonaceous particles and silicon carbide powder. The presence of the carbon limits grain growth so that a silicon carbide product having ... | 06/29/1976 |
| 3960577 | Dense polycrystalline silicon carbide A dense silicon carbide material having improved electrically conducting properties is disclosed which is prepared by forming a homogeneous dispersion of silicon carbide, a sufficient amount of a boron containing additive, and 3.5-10.0% by weight of silic... | 06/01/1976 |
| 3947550 | Method of making a silicon carbide article of less than full density This disclosure teaches a method of making a silicon carbide article of less than full density. A mixture of silicon carbide particles, silicon particles and a thermosetting polymeric material are molded to form an article as a green body. The green body ... | 03/30/1976 |
