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公开(公告)号:US2447789A
公开(公告)日:1948-08-24
申请号:US58445045
申请日:1945-03-23
Applicant: POLAROID CORP
Inventor: BARR EDGAR E
IPC: C23C14/24
CPC classification number: C23C14/243
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2.Birefringent solid film comprising intimate mixture of minute particles of isophthalic acid and terephthalic acid and method of manufacture 失效
Title translation: 包含间苯二甲酸微粒和对苯二甲酸的紧密混合物的双折射固体膜及制造方法公开(公告)号:US2447790A
公开(公告)日:1948-08-24
申请号:US58768445
申请日:1945-04-11
Applicant: POLAROID CORP
Inventor: BARR EDGAR E , WEST CUTLER D
IPC: G02B5/30
CPC classification number: G02B5/3008 , G02B5/3083
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公开(公告)号:US2423476A
公开(公告)日:1947-07-08
申请号:US65252446
申请日:1946-03-07
Applicant: POLAROID CORP
Inventor: BILLINGS BRUCE H , HYDE WALTER L , BARR EDGAR E
IPC: G01J5/20
CPC classification number: G01J5/20
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