Biodegradable oxidized cellulose esters
First Claim
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1. A biodegradable, oxidized cellulose ester having the following general formula I or II:
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Abstract
The present invention relates to the preparation of a series of oxidized cellulose esters suitable for use as a drug carrier in the development of biodegradable controlled and/or sustained release pharmaceutical, agricultural, and veterinary compositions, such as films, compacts, microspheres, and pellets. The esters are prepared by acylation of oxidized cellulose having at least 3% carboxyl groups. The resulting oxidized cellulose esters are soluble in aqueous alkaline solutions, water, and a variety of organic solvents.
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1 Claim
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1. A biodegradable, oxidized cellulose ester having the following general formula I or II:
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Current AssigneeUniversity of Iowa Research Foundation
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Original AssigneeUniversity of Iowa Research Foundation
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InventorsKumar, Vijay, Dong, Yang
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Primary Examiner(s)Jiang; Shaojia Anna
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Assistant Examiner(s)WHITE, EVERETT
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Application NumberUS10/007,866Publication NumberTime in Patent Office2,854 DaysField of Search536/63, 536/64, 536/67, 536/68, 536/69, 536/32, 536/124, 514/54US Class Current536/63CPC Class CodesC08B 15/00 Preparation of other cellul...C08B 3/00 Preparation of cellulose es...
