Building blocks
Patent 4521138 Issued on June 4, 1985. Estimated Expiration Date: 
September 9, 2002. 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 9, 2002. 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 D217244 D230846 D264996 379338 2737801 3073061 3389499 Inclined retaining wall and element therefor Patent #: 4229123 InventorAssigneeApplicationNo. 06/416206 filed on 09/09/1982US Classes:405/284, Retaining wall405/286, Concrete52/608, Nonrectangular cross-sectionD25/113Construction block or brick type (20)ExaminersPrimary: Husar, Cornelius J.Assistant: Stodola, Nancy J. Attorney, Agent or FirmInternational ClassesA01G 9/00 (20060101)E02D 29/02 (20060101) E02B 3/14 (20060101) E02D 17/20 (20060101) Foreign Application Priority Data1980-09-05 CHAbstractA building block for walls which are laid in courses without mortar and can be stabilized by planting, has a base wall, a face wall, and two curved side walls. The base wall has rounded transition sections to the face wall and to the side walls. The block includes at least two curved dividing walls bounding a central space and two outer spaces between the side walls, with the upper edges of the face wall, of the side walls and of the dividing walls lying at least approximately in one plane. The building block is open at a rear thereof opposite the face wall, and the building block has an open top extending in the above mentioned one plane from the open rear to the face wall.Field of SearchBANK, SHORE, OR BED PROTECTION | |
