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 |
| 5679845 | Process for producing taurine analogues The present invention relates to a process for producing amino/guanidinothiosulfonic acid, which comprises treating a styrenedivinylbenzene copolymer sulfonate of amino/guanidinoethyl disulfoxide into contact with an alkali, selectively eluting amino... | 10/21/1997 |
| 5601806 | Methods for scavenging active oxygen compounds and preventing damage from ultra violet B rays using taurine analogues Taurine analogues are used for scavenging active oxygen compounds and preventing and minimizing damage to the skin from ultraviolet rays. The taurine analogues have the following formula: ##STR1## wherein R1, R2 and R3 | 02/11/1997 |
| 5049808 | Method of determining the amount of the substances or ions contained in an ionic solution or a non-deionized solution and a one-sidebarrier-covered crystal oscillator used therefor A method of determining the amount of the substances or ions contained in an ionic solution or a non-deionized solution by measuring the frequency of a one side barrier-covered crystal oscillator comprising a crystal oscillator, a barrier to cover over on... | 09/17/1991 |
| 4898870 | Pyrroloquinoline quinone compounds useful as an enzyme inhibitor The present invention concerns an enzyme inhibitor containing the compound represented by the following formula (I) as an effective ingredient: ##STR1## where R represents hydrogen or substituted or not substituted alkyl group, alkenyl group, aryl gr... | 02/06/1990 |
| 4749719 | Method of treating skin pigmentation abnormalities with pantetheine-S-sulfonic acid Pantetheine-S-sulfonic acid and/or its salt(s) have(has) an effect of curing and preventing pigmentation in the skin, an effect of improving rough skin and a curative effect to wounds, burns and the like, therefore being used for agents for epidermis.... | 06/07/1988 |
| 4548955 | Nylon capsule responding to pH The present invention relates to a nylon capsule to whose pore portion is applied a bimolecular membrane so that the capsule can respond to pH. The nylon capsule accommodates various matters such that they can be released into the outside depending on the chan... | 10/22/1985 |