Patent 4937078 Issued on June 26, 1990. Estimated Expiration Date: August 26, 2008. 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.
Liposome encapsulated local anesthetic or analgesic agents when applied to skin or mucous membranes provided greater local anesthesia and analgesia than the same agents incorporated in conventional vehicles i.e., ointment, cream or lotion.
Other References
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August 26, 2008. 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.
