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1969-03-14 |
1977-06-14 |
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Non-bleeding indicators and dyes therefor used in pH determination process
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1973-03-09 |
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Mobil Oil Corp |
Lead trap
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1978-11-09 |
1981-06-16 |
Calgon Corporation |
Removal of acidica contaminants from gas streams by caustic impregnated activated carbon
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1982-03-26 |
1984-04-17 |
Minnesota Minning And Manufacturing Company |
Sorbent material for reducing formaldehyde emission
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1983-02-04 |
1987-09-24 |
Minnesota Mining And Manufacturing Company |
Method and apparatus for manufacturing an electret filter medium
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1983-11-18 |
1985-05-30 |
Drägerwerk AG, 2400 Lübeck |
Luftreinigungsmittel zur verwendung in luftfiltern
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1985-06-20 |
1987-12-07 |
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Forfarande och anordning for framstellning av filter
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1985-08-28 |
1990-03-20 |
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Bonded adsorbent structures and respirators incorporating same
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1986-05-19 |
1986-06-25 |
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Blended-fibre filter material
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Forfarande for framstellning av filter
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Polymeric sorbents for aldehydes
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