yifengchen 发表于 2011-5-24 21:15:02

us5242253法律状态

RT

cqlvpeng 发表于 2011-5-25 22:13:24

Re:us5242253法律状态-Status: Patented Case

http://portal.uspto.gov/external/portal/pair

Bibliographic Data
Application Number:07/958,174Customer Number: -
Filing or 371 (c) Date:10-08-1992Status: Patented Case
Application Type:UtilityStatus Date: 08-27-1993
Examiner Name:WILSON, NEILL RLocation:   FILE REPOSITORY (FRANCONIA)
Group Art Unit:3508Location Date: 09-04-1997
Confirmation Number:1929Earliest Publication No: -
Attorney Docket Number:101Earliest Publication Date: -
Class / Subclass:411/386Patent Number: 5,242,253
First Named Inventor:JAMES G. FULMER , ADDISON, IL (US)Issue Date of Patent: 09-07-1993

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Title of Invention: THREAD-FORMING SCREW

yifengchen 发表于 2011-5-26 22:00:33

Re:us5242253法律状态

该专利于1995年6月8日之前申请且授权，自授权日起至今已近超过17年，是否可认为已经过期，谢谢！
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