Device for mounting an access cover
CA 2250370 A1 · Owner: Hawkins, David John Drake · Inventors: Hawkins, David John Drake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a device for mounting an access cover (60) in a wearing surface, for example a road surface having a wear course (7) , overlying a base course (8) the device comprising a service frame (50) in which the cover is removably received and a main frame (20) for mounting below the base course, wherein the service frame is movable to a plurality of positions relative to the main frame including a first position at which in , use, a top surface (62) of the access cover is substantially flush with the top surface (11) of the wearing course and a second position at which in use, the top surface of the access cover is substantially flush with the bottom surface …
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
- Filed March 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- 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.