Liquid filled insoles
Patent 4017931 Issued on April 19, 1977. Estimated Expiration Date: 
April 19, 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 19, 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 1517171 2477588 2549343 3063076 3418732 3724106 3922801 InventorAssigneeApplicationNo. 05/688299 filed on 05/20/1976US Classes:12/146B, Soles36/44LaminatedExaminersPrimary: Guest, Alfred R.Attorney, Agent or FirmAbstractA hollow insole provided with non-communicating compartments which are filled with liquid to form individual foot-supporting cushions. Included in the invention is a method of making the insole. | |
