Field intensification in radio frequency thermotherapy
Patent 4154246 Issued on May 15, 1979. Estimated Expiration Date: 
July 25, 1997. 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.
July 25, 1997. 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 References 2515683 3230957 3566877 3890953 3915151 Device for superficially heating an adjacent body 4030480 InventorApplicationNo. 05/818502 filed on 07/25/1977US Classes:607/99, Localized application607/154High frequency radiation typeExaminersPrimary: Cohen, Lee S.Attorney, Agent or FirmInternational ClassesA61B 18/18 (20060101)A61N 1/40 (20060101) AbstractA technique in the treatment of tumors in humans utilizing radio frequency electromagnetic radiation to produce necrosis of the tumors by which intensification at the situs of the tumor of a radio frequency field applied across the portion of the body containing the tumor is obtained by positioning a small inductance element preferably in the form of a closed resonant circuit such that the inductance is in or adjacent to the tumor tissue and thus functions to concentrate the field at that location. Alternatively, rather than utilizing a resonant circuit, the inductance can be coupled to the output of the radio frequency generator utilized and applies the radio frequency electromagnetic field.Other References
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