Patent Yard Sign in
Expired European patentEurope

Filter tap for optical communication systems

EP 0260654 B1 · Applicant: Hicks, John Wilbur, Jr.

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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, and the Claude kit works from them.

Why it's free to use

  • Filed September 15, 1987 and granted June 29, 1994. A European patent lasts at most 20 years from filing, so its term ended September 15, 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 15, 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 15, 1987
PublishedMarch 23, 1988
GrantedJune 29, 1994
Term endedSeptember 15, 2007
Application numberEP 87113473
Classification (CPC)G02B6/4215 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedSep 15, 1987PublishedMarch 23, 1988Patent grantedJune 29, 1994Term endedSep 15, 2007

Sources & verification