Method for treatment of acne
Patent 4132781 Issued on January 2, 1979. Estimated Expiration Date: 
January 2, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 2, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3472931 InventorAssigneeApplicationNo. 05/534229 filed on 12/19/1974US Classes:514/29, The hetero ring has exactly 13 ring carbons (e.g., erythromycin, etc.)514/423, C=X bonded directly to the five-membered hetero ring by nonionic bonding (X is chalcogen)514/859AcneExaminersPrimary: Schenkman, LeonardAttorney, Agent or FirmInternational ClassesA61K 9/08 (20060101)A61K 9/10 (20060101) A61K 9/12 (20060101) A61K 9/06 (20060101) A61K 31/34 (20060101) AbstractThere is disclosed a topical antibacterial composition and method for topical antibiotic treatment. The method involves contacting the skin of a human or animal with an effective amount of a composition containing an antibiotic of the erythromycin family and 2-pyrrolidone or an N-lower alkyl-2-pyrrolidone. The preferred use of the foregoing composition and method is in the treatment of acne.Other References
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