Electron microscope (comprising an auxiliary lens)
CA 1110781 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Der Mast, Karel D.; Rakels, Christiaan J.; Le Poole, Jan B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switchable auxiliary lens is arranged in the vicinity of the objective lens of an electron microscope to enable switching between TEM mode and STEM mode. The auxiliary lens is formed notably by an interruption in the magnetic circuit off one of the poles of the main lens, possibly in conjunction with an electromagnetic coil which can be excited in a commutatable manner. -15-
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 October 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.