IP Library › Granted Patent US 6,657,090
Granted Patent Utility
US 6,657,090 · Confirmation No. 7492

PROCESS FOR PREPARING HIGHLY PURE RAFFINATE II AND METHYL TERT-BUTYL ETHER

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2003-08-22 IFEE Issue Fee Payment (PTO-85B) 1 View
2001-10-19 TRNA Transmittal of New Application 2 View
2001-10-19 ADS Application Data Sheet 2 View
2001-10-19 SPEC Specification 22 View
2001-10-19 CLM Claims 3 View
2001-10-19 ABST Abstract 1 View
2001-10-19 DRW Drawings-only black and white line drawings 1 View
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Quick Facts
Patent No.
US 6,657,090
App. No.
09/981,985
Filed
2001-10-19
Granted
2003-12-02
Pub. No.
US20020078622A1
Art Unit
1621
PTA
0 days