us5242253法律状态

RT

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

Bibliographic Data
  Application Number:  07/958,174  Customer Number: -  
Filing or 371 (c) Date:  10-08-1992  Status: Patented Case  
Application Type:  Utility  Status Date: 08-27-1993  
Examiner Name:  WILSON, NEILL R  Location:   FILE REPOSITORY (FRANCONIA)  
Group Art Unit:  3508  Location Date: 09-04-1997  
Confirmation Number:  1929  Earliest Publication No: -  
Attorney Docket Number:  101  Earliest Publication Date: -  
Class / Subclass:  411/386  Patent 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

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！