Components for ballast-less railroad lines laid on pre-fabricated reinforced concrete slabs
CA 1280102 C · Owner: Migliacci, Antonio · Inventors: Cremaschi, Gianfranco; Migliacci, Antonio; Bono, Giancarlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
COMPONENTS FOR BALLAST-LESS RAILROAD LINES LAID ON PRE-FABRICATED REINFORCED CONCRETE SLABS" ABSTRACT, The invention is concerned with components for ballst-less railroad lines laid on pre-fabricated reinforced concrete slabs, which can eliminate the need for periodic maintenance of the ballast of traditional railroad lines, such maintenance being expensive and often difficult to carry out. The components include pre-fabricated, possibly prestressed, slabs positioned upon a steel reinforced concrete block having the functions of a foundation and connector for the pre-fabricated slabs with, the interposition of a concrete-asphalt mortar layer between the slabs and block; said slabs being …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.