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US 6,821,420 · Confirmation No. 3216

APPARATUS AND METHOD FOR CLEANING MEMBRANE FILTRATION MODULES

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2004-06-07 LET. Miscellaneous Incoming Letter 3 View
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2004-05-20 NOA Notice of Allowance and Fees Due (PTOL-85) 3 View
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2003-05-01 TRNA Transmittal of New Application 3 View
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2003-05-01 OATH Oath or Declaration filed 2 View
2003-05-01 WFEE Fee Worksheet (SB06) 1 View
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Quick Facts
Patent No.
US 6,821,420
App. No.
10/428,601
Filed
2003-05-01
Granted
2004-11-23
Pub. No.
US20030205519A1
Art Unit
1723
PTA
-180 days