Non-slip material
Patent 7162839 Issued on January 16, 2007. Estimated Expiration Date: 
November 11, 2022. 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 11, 2022. 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 538467 937415 1044283 1091214 1215235 1959101 2004747 2975977 Anti-skid device for vehicles Beveled lobe anti-skid grating Inventors
AssigneeApplicationNo. 10475167 filed on 11/11/2002US Classes:52/180, Perforate structure having twisted element or particular surface52/177, SPECIFIED WEAR OR FRICTION-TYPE TRAFFIC-CARRYING SURFACE52/630, IMPERFORATE PANEL WITH INTEGRAL REINFORCING428/597, Struck-out portion type52/675, Material laterally displaced280/169, Treads72/325, By composite tool (e.g., piercing)72/327, With endless cutting edges428/613, Porous (e.g., foamed, spongy, cracked, etc.)D25/160, On two axes238/14, Traction mats52/98, FRANGIBLE SECTION OR MEANS52/179, Tread-nosing; e.g., shaped stair pad52/24, COVER WITH PROJECTING RESTRAINER; E.G., SNOW STOP404/19, Anti-slip surface52/181, Exposed embedded element or inserted filler72/14.8Including use of sensor responsive to information carried by removable auxiliary record (e.g., recording disk, tape, or card)ExaminersPrimary: Chapman, Jeanette E.Attorney, Agent or FirmForeign Patent References
International ClassE01C 11/24AbstractThe invention provides a slip stopper which achieves a great slip stopping effect, and can be used for a location where a problem occurs if a through hole is opened therein. In a protruding portion that protrudes from the upper surface of a steel plate in the plate thickness direction, a concave portion and drain channels, that lead to the steel plate upper surface from the concave portion, are formed. The inner surface of the concave portion and the groove side surfaces of drain channels are formed by shear planes which extend substantially perpendicular to the steel plate upper surface, and are obtained by half blanking that does not open a through hole in the steel plate. | |
