Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2005-10-04
2005-10-04
Richter, Johann (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S580000
Reexamination Certificate
active
06951956
ABSTRACT:
Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2is not lower than 35° C., and a difference between the crystallization temperature Tc1and the glass transition temperature Tg is not lower than 40° C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid+38° C.). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T2−T1) between the temperature T2at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T1at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5° C.
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Advances in Biomaterials (1982), 3, 781-6.
Itoh Daisuki
Miura Hiromitsu
Nakajima Junji
Ono Toshihiko
Yamane Kazuyuki
Dinsmore & Shohl LLP
Kureha Kagaku Kogyo K.K.
Puttlitz Karl
Richter Johann
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