Australian application, no grantAustralia
Improvements in or relating to methods of manufacturing electrodes having a small thermionic emission for use in electric discharge tubes and electric discharge tubes containing at least one electrode so manufactured
AU 1957024986 · Applicant: N V Philips Gloeilampenfabrieken
Overview
Drawings and full text
Its specification, documents and status are on IP Australia's AusPat.
Open the AusPat recordRead the whole patent
Listed from its IP Australia record in Patent Yard's archive of Australian patents past their term. Its claims, description and drawings are in the AusPat record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 30, 1957. Even if it was granted, its term would have ended by January 30, 1978.
- A pharmaceutical extension adds at most five years, so even that would have ended by January 30, 1983.
- We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 30, 1957
GrantedNo grant recorded
Term ended byJanuary 30, 1978
Application numberAU 1957024986
Classification (IPC)H01J9/16 +1 more
Timeline
Timeline From IP Australia dates
Sources & verification
Official IP Australia records
Everything on this page comes from the IP Australia record linked above. Data from IP Australia's IPGOD, licensed under CC BY 2.5 AU.