Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 4798939 | Pressurized liquid cooker with integrated radiant heating apparatus A pressurized batch cooking pot has an encircling radiant heater which has a high temperature insulation shell with end abutting the pot and a center portion spaced from the pot. A spiral coil is firmly embedded within the inner wall of the insulation she... | 01/17/1989 |
| 4768426 | Oil filter apparatus and method for deep oil pressure cooking apparatus Cooking oil is contained within a pressurized pot having a radiant heat to raise the oil temperature to the cooking temperature. An oil reservoir is located adjacent and below the pot, with a releasable cover for addition of oil and a low temperature heat... | 09/06/1988 |
| 4721094 | Deep oil cooker cover apparatus A pressure interlock means to prevent release and opening of the cover under a potentially dangerous condition. The cooking apparatus is formed including a suitable open-top pot having a top cover unit secured to open and close the pot. Cooking oil is con... | 01/26/1988 |
