Glass sheet press bending mold
CA 2007702 C · Owner: Hall, Harold R. · Inventors: Hagedorn, Floyd T.; Modesitt, William L.; Hall, Harold R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved covering for continuous surface press bending molds providing selectively variable rigidity for matching that desired in bending a particular part on the mold. The shaping element of the mold includes a resilient body having a latticework of flexible metallic bands encapsulated therein. The resilient body is covered by a plurality of superimposed individual sheets of a fibrous heat-resistant, normally pliable material which in turn, are, covered by a layer of fiberglass cloth. One or more of the individual fibrous sheets is treated with a rigidizer to impart a selected suitable degree of rigidity to the shaping element.
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 January 12, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 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.