Improvements in roofing washer-dispensing machine
CA 2029066 C · Owner: Omg Roofing, Inc. · Inventors: Hasan, Syed Riaz-Ul; Beach, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing washer-dispensing machine having improved features. A novel magazine comprises a substantially box-like container with a substantially open face, for a stack of circular roofing washers having inserts, and a substantially rigid rod mounted removably to a top wall of the box so as to extend downwardly into the central apertures of the stack washers, except for the lowermost washer so as to, restrain the remaining washers. The machine comprises a shuttle arranged to displace the lowermost washer from the stack when it is desired to dispense such washer. The shuttle includes a novel arrangement of means overlying and underlying marginal portions of such washer.
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 October 31, 1990 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2012.
- 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.