Expired European patentEurope
Delay circuit for electric blasting, detonating primer having delay circuit and system for electrically blasting detonating primers
EP 0261886 B1 · Applicant: NIPPON OIL AND FATS COMPANY, LIMITED
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
No Claude kit for weapons
Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.
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 September 18, 1987 and granted June 3, 1992. A European patent lasts at most 20 years from filing, so its term ended September 18, 2007.
- 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 March 18, 2013.
- 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.
FiledSeptember 18, 1987
PublishedMarch 30, 1988
GrantedJune 3, 1992
Term endedSeptember 18, 2007
Application numberEP 87308281
Classification (CPC)F42D1/055
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.