Ship ladder
CA 1097878 A · Owner: Laitram Corporation (The) · Inventors: Lapeyre, James M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ladder is provided which is especially adapted for shipboard use and which is safe and comfortable to use of rela-, tively light weight and occupying relatively small floor and overhead space. The ladder comprises a single stringer disposed between upper and lower deck or floor levels at a predetermined angle of inclination, and having an array of half treads on each side of the stringer, each array being vertically spaced from the other along the length of the stringer. The half treads are affixed to and extend from the respective sides of the stringer and each include and integral outwardly extending portion which terminates in a plane forward of a plane passing through the front edges …
Read the whole patent
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 March 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 1998.
- 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.