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Home › Ether-based polyurethane elevator sheave liner-polyurethane-urea made from polyether urethane prepolymer chain extended with polyester/diamine blend

Ether-based polyurethane elevator sheave liner-polyurethane-urea made from polyether urethane prepolymer chain extended with polyester/diamine blend

US Patent 5112933 · Granted May 12, 1992

Estimated economic value: $3,283,000 ⓘ

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