请问这件专利失效了吗？
Legal status of US4439489 (A)PRS Code :AS
Code Expl.:US 34922282A 1993-10-25AS ASSIGNMENT Owner Name BORDEN, INC., OHIO
Code Expl.:US 34922282A 1993-10-25AS ASSIGNMENT Free Format Text ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ACME RESIN CORPORATION;REEL/FRAME:006747/0482
Code Expl.:US 34922282A 1993-10-25AS ASSIGNMENT Effective DATE 19931025
Country Code :US
Filing / Published Document :F
Document Number :34922282
Kind Code :A
IPR Type :PI
PRS DOCUMENT TYPE :P
Gazette DATE :1993-10-25
Legal Event Code 1 :AS
DATE last exchanged :2009-06-25
DATE first created :2009-06-23
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PRS Code :AS
Code Expl.:US 34922282A 1996-06-17AS ASSIGNMENT Owner Name BORDEN CHEMICAL, INC., OHIO
Code Expl.:US 34922282A 1996-06-17AS ASSIGNMENT Free Format Text ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BORDEN, INC.;REEL/FRAME:008000/0363
Code Expl.:US 34922282A 1996-06-17AS ASSIGNMENT Effective DATE 19960611
Country Code :US
Filing / Published Document :F
Document Number :34922282
Kind Code :A
IPR Type :PI
PRS DOCUMENT TYPE :P
Gazette DATE :1996-06-17
Legal Event Code 1 :AS
DATE last exchanged :2009-05-28
DATE first created :2009-05-28
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PRS Code :AS
Code Expl.:US 34922282A 2002-04-08AS ASSIGNMENT Owner Name BORDEN CHEMICAL, INC. A NEW JERSEY CORPORATION, OH
Code Expl.:US 34922282A 2002-04-08AS ASSIGNMENT Free Format Text ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BORDEN CHEMICAL, INC. A DELAWARE CORPORATION;REEL/FRAME:012785/0584
Code Expl.:US 34922282A 2002-04-08AS ASSIGNMENT Effective DATE 20020405
Country Code :US
Filing / Published Document :F
Document Number :34922282
Kind Code :A
IPR Type :PI
PRS DOCUMENT TYPE :P
Gazette DATE :2002-04-08
Legal Event Code 1 :AS
DATE last exchanged :2009-03-26
DATE first created :2009-03-23
这件专利于1982-2-16申请，按申请时间应该已经到期了，但是全篇没有出现一个与dead、expired等相关的词语，
另外Legal Event Code 1 :AS 中的AS什么意思，有的还会出现Legal Event Code 1 :FP，其中的FP什么意思？
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