Method for removing sludge or mud from the bo...

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US Patent Issued onAugust 5, 1986
Estimated Patent Expiration Date:截止日期 March 16, 2004Estimated Expiration Date is calculated based on simple USPTO term provisions美国商标管理局任期规定. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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