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1958-06-24 |
1961-08-01 |
Koppers Co Inc |
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1958-12-08 |
1962-08-21 |
Koppers Co Inc |
Method of making a self extinguishing expandable polymer of styrene by bromination
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1959-12-03 |
1962-06-19 |
Koppers Co Inc |
Method of producing self-extinguishing foamable polystyrene by brominating foamable polystyrene in aqueous suspension
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1960-03-01 |
1963-05-07 |
Armstrong Cork Co |
Preparation of expandable polystyrene particles
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1961-05-27 |
1966-12-29 |
Basf Ag |
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1961-10-26 |
1967-09-19 |
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1961-11-06 |
1965-04-13 |
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1965-09-21 |
Koppers Co Inc |
Process for the production of expandable particles of styrene polymer
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1962-04-23 |
1966-05-24 |
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1962-10-15 |
1966-05-10 |
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Preparation of molded plastic articles
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1963-04-10 |
1967-02-21 |
Diamond Alkali Co |
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1963-05-20 |
1964-08-28 |
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1967-12-19 |
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1965-01-07 |
1965-06-29 |
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1965-04-15 |
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1965-10-20 |
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Method of making foamed plastics
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1966-05-23 |
1970-02-10 |
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Preparation of free-flowing foamable polystyrene beads
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1966-05-31 |
1969-06-10 |
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1968-05-28 |
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1971-01-15 |
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