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3668262
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Patent number 3,668,262
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Issue date Jun 6, 1972
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C07 - ORGANIC CHEMISTRY
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3666866
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Patent number 3,666,866
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Issue date May 30, 1972
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3659023
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Patent number 3,659,023
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Issue date Apr 25, 1972
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3585245
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Patent number 3,585,245
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Issue date Jun 15, 1971
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C07 - ORGANIC CHEMISTRY
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3525794
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Patent number 3,525,794
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Issue date Aug 25, 1970
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3499089
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Patent number 3,499,089
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Issue date Mar 3, 1970
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C07 - ORGANIC CHEMISTRY