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| Date recorded | Event | Details | |
|---|---|---|---|
| 19910315 | AS | ASSIGNMENT | DESCRIPTION : PARTYTYPE:OWNER; OWNER:ATLANTIC RICHFIELD COMPANY, LOS ANGELES, CA A CORP; OLDPARTY:ASSIGNMENT OF ASSIGNORS INTEREST.; ASSIGNOR:MC CREARY, ROBERT A. JR.; REEL/FRAME:005635/0706 EFFECTIVE DATE : 19910131 |
| 19911030 | PAT1 | Patented Case | DESCRIPTION : NATIONAL OFFICE DATA: PATENTED CASE |
| 19911031 | PAT1 | Patented Case | DESCRIPTION : NATIONAL OFFICE DATA: PATENTED CASE |
| 19911031 | STCF | INFORMATION ON STATUS: PATENT GRANT | DESCRIPTION : PATENTED CASE |
| 19911112 | + | granted / extensions (spc, cpc, pte) | |
| 19941207 | FEPP | FEE PAYMENT PROCEDURE | DESCRIPTION : PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
| 19950120 | +FPAY | FEE PAYMENT | YEAR OF FEE PAYMENT : 4 |
| 19950620 | REMI | MAINTENANCE FEE REMINDER MAILED | |
| 19990608 | REMI | MAINTENANCE FEE REMINDER MAILED | |
| 19991012 | +FPAY | FEE PAYMENT | YEAR OF FEE PAYMENT : 8 |
| 19991012 | +SULP | SURCHARGE FOR LATE PAYMENT | |
| 20000124 | AS | ASSIGNMENT | DESCRIPTION : PARTYTYPE:OWNER; OWNER:ARCH COAL, INC., MISSOURI; OLDPARTY:ASSIGNMENT OF ASSIGNORS INTEREST; ASSIGNOR:ATLANTIC RICHFIELD COMPANY; REEL/FRAME:010557/0264 EFFECTIVE DATE : 19990624 |
| 20030317 | +FPAY | FEE PAYMENT | YEAR OF FEE PAYMENT : 12 |
| 20050110 | AS | ASSIGNMENT | DESCRIPTION : PARTYTYPE:OWNER; OWNER:PNC BANK, NATIONAL ASSOCIATION, PENNSYLVANIA; OLDPARTY:SECURITY AGREEMENT; ASSIGNOR:ARCH COAL, INC.; REEL/FRAME:015541/0001 EFFECTIVE DATE : 20041222 |
| 20110206 | 20 year period | ||
| 20110206 | Calculated Patent Term Expiry | ||
| 20160206 | 25 year period | ||
| 20160624 | AS | ASSIGNMENT | DESCRIPTION : PARTYTYPE:OWNER; OWNER:ARCH COAL, INC., MISSOURI; OLDPARTY:RELEASE BY SECURED PARTY; ASSIGNOR:PNC BANK NATIONAL ASSOCIATION; REEL/FRAME:039003/0400 EFFECTIVE DATE : 20160623 |
| 20161005 | AS | ASSIGNMENT | DESCRIPTION : PARTYTYPE:OWNER; OWNER:WILMINGTON TRUST, NATIONAL ASSOCIATION, IN ITS CAP; OLDPARTY:PATENT SECURITY AGREEMENT; ASSIGNOR:ARCH COAL, INC.; REEL/FRAME:040234/0699 EFFECTIVE DATE : 20161005 |