Australian application, no grantAustralia
Tracked mine roof support
AU 1977031270 · Applicant: Chakbonnages Defrance
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 December 6, 1977. Even if it was granted, its term would have ended by December 6, 1998.
- A pharmaceutical extension adds at most five years, so even that would have ended by December 6, 2003.
- We check Australian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 6, 1977
GrantedNo grant recorded
Term ended byDecember 6, 1998
Application numberAU 1977031270
Classification (IPC)E21F13/00 +2 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.