Artificial disc
Patent 5071437 Issued on December 10, 1991. Estimated Expiration Date: 
November 21, 2010. 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.
November 21, 2010. 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 3867728 Artificial intervertebral disc Spinal implant Surgical prosthetic implant facilitating vertebral interbody fusion and method Intervertebral disc endoprosthesis Replacement disc Functional and biocompatible intervertebral disc spacer Intervertebral prosthesis Patent #: 4917704 InventorApplicationNo. 617923 filed on 11/21/1990US Classes:623/17.16, Including spinal disc spacer between adjacent spine bones606/61Spinal positioner or stabilizerExaminersPrimary: Isabella, David J.Assistant: Iantorno, Stephanie L. Attorney, Agent or FirmForeign Patent References
International ClassA61F 002/44AbstractA spinal disc prosthesis comprises an upper flat rigid plate, a lower flat rigid plate, and a flat elastomeric core interposed between said plates and adhered to the plates. A plurality of spaced-apart protuberances extend outwardly from the exposed faces of the plates for engagement with vertebrae above and below the plates. A porous coating covers the exposed surfaces of the plates. The elastomeric core is made of a polyolefin rubber having mechanical properites similar to a natural spinal disc.Other References
Field of SearchSpinal positioner or stabilizer | |
