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QUATERNARY AMMONIUM PHOSPHONIUM AND ARSONIUM CATALYSTS FOR THE PRODUCTION OF POLYCARBONATES BY THE TRANSESTERIFICATION METHOD
US 3,442,854 A
Filed
: 01/20/1966
Issued
: 05/06/1969
Est. Priority Date
: 01/21/1965
Status: Expired due to Term
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Current Assignee
Bottenbruch Ludwig
,
Curtius Ulrich
,
Schnell Hermann
Original Assignee
Bottenbruch Ludwig
,
Curtius Ulrich
,
Schnell Hermann
Inventors
CURTIUS ULRICH
,
BOTTENBRUCH LUDWIG
,
SCHNELL HERMANN
Application Number
US04/521,808
Time in Patent Office
1,202 Days
Field of Search
US Class Current
528/198
CPC Class Codes
C08G 64/30
using carbonates
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