US4783799A (Expired)
1992-06-10
MAINTENANCE FEE REMINDER MAILED
1992-11-08
FOR FAILURE TO PAY MAINTENANCE FEES
1993-01-19
-EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE
Effective DATE 19921108
1997-04-23
ASSIGNMENT
Owner Name FIRST UNION NATIONAL BANK OF MARYLAND, VIRGINIA
Free Format Text ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCIENTIFIC ECOLOGY GROUP, INC., A TENNESSEE CORPORATION;REEL/FRAME:008461/0081
Effective DATE 19970418
1999-01-11
ASSIGNMENT
Owner Name FIRST UNION BANK OF MARYLAND, CALIFORNIA
Free Format Text RE-RECORD TO CORRECT THE NATURE OF CONVEYANCE PREVIOUSLY RECORDED ON REEL 8461, FRAME 0081, ASSIGNOR CONFIRMS THE ASSIGNMENT OF THE ENTIRE INTEREST.;ASSIGNOR:SCIENTIFIC ECOLOGY GROUP, INC., THE;REEL/FRAME:009693/0916
Effective DATE 19970418
1999-01-12
ASSIGNMENT
Owner Name GTS DURATEK BEAR CREEK, INC., MARYLAND
Free Format Text CHANGE OF NAME;ASSIGNOR:SCIENTIFIC ECOLOGY GROUP, INC., THE;REEL/FRAME:009748/0505
Effective DATE 19980120
1999-02-03
ASSIGNMENT
Owner Name FIRST UNION NATIONAL BANK (F/K/A FIRST UNION NATIO
Free Format Text AMENDED AND RESTATED ASSIGNMENT OF SECURITY INTEREST IN US PATENTS AND TRADEMARKS DATED AS OF 2/1/99 AMENDING ORIGINAL ASSIGNMENT DATED 04/18/97.;ASSIGNOR:GTS DURATEK BEAR CREEK, INC. (F/K/A SCIENTIFIC ECOLOGY GROUP, INC., THE);REEL/FRAME:009719/0200
Effective DATE 19990122
2000-06-13
ASSIGNMENT
Owner Name FIRST UNION NATIONAL BANK, AS COLLATERAL AGENT, NO
Free Format Text SECURITY AGREEMENT;ASSIGNOR:GTS DURATEK BEAR CREEK, INC., F/K/A THE SCIENTIFIC ECOLOGY GROUP, INC.;REEL/FRAME:010871/0215
Effective DATE 20000608
2018-01-30
ON STATUS: PATENT DISCONTINUATION
Free Format Text PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
