Kit and method for demonstrating carpet cleaning principles
CA 1306604 C · Owner: Greeley, Geoffrey R. · Inventors: Greeley, Geoffrey R.; Middleton, Ernest W.; Lafontsee, Lawrence J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A kit (10) for visual demonstration of principles relating to carpets and carpet care. The kit includes a horizontal base member, vertical members (30) removably securable in erect position with respect to the base member at their proximal ends (32), and means (28) on the base member to hold the vertical members in carrying position when not in their erect positions. A highly preferred base member is a transparent rigid box (12) with spaced upper and lower walls (22,14), the vertical members being attached to the lower wall and extending loosely through openings (24) in the upper wall. The method includes applying dirt onto a shaft near its distal end and, when the shaft is erect on the …
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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 2009.
- 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.