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 |
| 7425633 | Pyrrolidine compounds A compound of the following formula: wherein R1, R2, R3, R4, R5, R6, R7, R8, T, X, Y, and Z are as defined herein. Also disclosed is a ... | 09/16/2008 |
| 7396838 | Use of 1H-indol-3-yl-2-oxoacetamide compounds A method of treating cancer including administering to a subject in need thereof an effective amount of a compound of the formula 1: wherein R1, R2, R3, R4, and n are as defined h... | 07/08/2008 |
| 7332502 | Phenanthroindolizidine alkaloids A group of novel phenanthroindolizidine alkaloid compounds as shown and their use in treating cancer. Also disclosed are methods of using phenanthroindolizidine alkoid compounds in suppressing NO and TNF-α production, inhibiting MEKK1 activity and cyclooxygenase II... | 02/19/2008 |
| 7199370 | Device and method for digitizing gamma ray energy and characterizing peak time and decay time constant without the use of ADC A device and method used in high resolution positron emission tomography (PET) systems for digitizing gamma ray energy and characterizing peak time and decay time constant, models a voltage pulse generated upon a PET event detection as a fast linearly rising edge fo... | 04/03/2007 |
| 6903104 | Indol-3-YL-2-oxoacetamide compounds and methods of use thereof The invention is based on the discovery that certain 3-oxoacetamideindolyl compounds have potent anticancer and anti-angiogenic activity. The 3-oxoacetamideindolyl compounds are of the following formula. In this formul... | 06/07/2005 |