Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2007-08-21
2007-08-21
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C524S725000, C524S726000, C524S755000, C524S765000, C524S770000, C525S054100, C525S538000, C525S540000, C528S332000, C528S399000, C528S400000, C528S422000
Reexamination Certificate
active
10835378
ABSTRACT:
Disclosed are polyphosphazenes of Formula 1 showing a sol-gel behavior with a temperature change, a preparation method thereof, and injectable thermosensitive polyphosphazene hydrogels using the same
REFERENCES:
patent: 6319984 (2001-11-01), Song et al.
patent: 2002/0014616 (2002-02-01), Allcock et al.
patent: 1020000002785 (2000-01-01), None
patent: 1020010047025 (2001-06-01), None
Jeong, Byeongmoon, et al., “Thermosensitive sol-gel reversible hydrogels”, Advanced Drug Delivery Reviews, 2002, vol. 54, pp. 37-51.
Hatefi, A., et al., “Biodegradable injectable in situ forming drug delivery systems”, Journal of Controlled Release, 2002, vol. 80, pp. 9-28.
Jeong, B., et al., “New biodegradable polymers for injectable drug delivery systems”, Journal of Controlled Release, 1999, vol. 62, pp. 109-114.
Song, Soo-Chang, et al., “A New Class of Biodegradable Thermosensitive Polymers. I. Synthesis and Characterization of Poly(organophosphazenes) with Methoxy-Poly (ethylene glycol) and Amino Acid Esters as Side Groups”, Macromolecules, 1999, vol. 32, pp. 2188-2193.
Lee, Sang Beom, et al., “A New Class of Biodegradable Thermosensitive Polymers. 2. Hydrolytic Properties and Salt Effect on the Lower Critical Solution Temperature of Poly(organophosphazenes) with Methoxylpoly(ethylene glycol) and Amino Acid Esters as Side Groups”, Macromolecules, 1999, vol. 32, pp. 7820-7827.
Lee, Bae Hoon, et al., “A Thermosensitive Poly(organophosphazene) Gel”, Macromolecules, 2002, vol. 35, pp. 3876-3879.
Lee Bae-Houn
Song Soo-Chang
Boykin Terressa
Darby & Darby
Korea Institute of Science and Technology
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