Fluid charged roadway barrier
Patent 4978245 Issued on December 18, 1990. Estimated Expiration Date: 
August 21, 2009. 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.
August 21, 2009. 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 3795220 3880406 Traffic safety control module system Collapsible road barrier Hollow plastic barricade Barricade Portable traffic barrier Patent #: 4852511 InventorApplicationNo. 396336 filed on 08/21/1989US Classes:404/6, TRAFFIC STEERING DEVICE OR BARRIER116/63P, Portable404/10, Yielding404/13Discrete interfitted elementExaminersPrimary: Britts, Ramon S.Assistant: Schoeppel, Roger J. Attorney, Agent or FirmInternational ClassE01F 013/00AbstractThe invention is directed to a light weight, fluid charged, stackable, and easily placeable traffic barrier. The barrier includes a lightweight frame, made up of a skin or other lightweight framing elements. The barrier includes an interior bladder chamber for charging with a weighting fluid. | |
