Anti-skidding sole
Patent 4571852 Issued on February 25, 1986. Estimated Expiration Date: 
September 11, 2004. 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.
September 11, 2004. 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 D114340 D259595 1120082 2365027 2553616 3593436 InventorsAssigneeApplicationNo. 06/649961 filed on 09/11/1984US Classes:36/32R, Rubber36/25R, SOLES36/59CModified tread surfaceExaminersPrimary: Jaudon, Henry S.Assistant: Meyers, Steven N. Attorney, Agent or FirmInternational ClassesA43B 13/14 (20060101)A43B 13/22 (20060101) AbstractAn anti-skidding sole made of rubber or similar material, for boot or shoe. This sole has a lower surface provided with at least one integral, rib-like member projecting downwardly therefrom. This rib-like member is in the shape of a spiral and has an overall bottom surface which is substantially flat. Due to the spiral shape of this rib-like member, the air, water and/or oil boxed up under the sole may escape therefrom without forming an air or liquid cushion, and thus may allow the sole to positively contact the ground where the rib-like member provides anti-skid edges in every direction. | |
