European application, no grantEurope
Method of forming a wear resistant gun barrel
EP 0339692 A2 · Applicant: GENERAL ELECTRIC COMPANY
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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Read the whole patent
Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents.
Why it's free to use
- Filed April 29, 1985 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 29, 2005.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by October 29, 2010.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledApril 29, 1985
PublishedNovember 2, 1989
GrantedNever granted
Term endedApril 29, 2005
Application numberEP 89111458
Classification (CPC)C23C4/185 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.