Eustachian tube prosthesis and method for its implantion
Patent 4015607 Issued on April 5, 1977. Estimated Expiration Date: 
April 5, 1994. 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.
April 5, 1994. 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 1642819 3783454 3881199 InventorApplicationNo. 05/651723 filed on 01/23/1976US Classes:623/23.64, Hollow or tubular part or organ (e.g., bladder, urethra, bronchi, bile duct, etc.)604/264Body inserted tubular conduit structure (e.g., needles, cannulas, nozzles, trocars, catheters, etc.)ExaminersPrimary: Frinks, Ronald L.Attorney, Agent or FirmAbstractA eustachian tube prosthesis comprising a flanged tube which is positioned in the eustachian tube passageway. The flange is located below the anterior annulus of the middle ear cavity. One end of the tube lies within the middle ear cavity and the other end lies within the eustachian tube passageway. The prosthesis is implanted by lifting the tympanic membrane and inserting the tube past the membrane and into position within the eustachian tube passageway.Other References
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