(12) United States Patent (10) Patent No.: US 6,692,728 B2 Weipert Et Al
USOO6692728B2 (12) United States Patent (10) Patent No.: US 6,692,728 B2 Weipert et al. (45) Date of Patent: Feb. 17, 2004 (54) POLYESTERS BASED ON HYDROXY FATTY (52) U.S. Cl. ......................... 424/59; 424/497; 424/489; ACDS AND LOWER HYDROXY ALKYL 424/70.11; 424/78.37; 424/78.08; 514/785; ACDS AND USES THEREOF 560/171; 560/172; 560/176; 560/183; 525/400 (58) Field of Search .......................... 424/59, 497, 489, (75) Inventors: Paul David Weipert, High Point, NC 424/70.11, 78.37; 514/785; 560/172,176, (US); Bharat B. Desai, Spartanburg, 183; 525/400 SC (US) (73) Assignee: Ethox Chemicals LLC, Greenville, SC ") References Cited (US) U.S. PATENT DOCUMENTS ( c: ) Notice: Subject to any disclaimer, the term of this 5,502,116 A 3/1996 Noda ......................... 525/415 patent is extended or adjusted under 35 5,614,576 A * 3/1997 Rutherford et al. ......... 524/270 U.S.C. 154(b) by 0 days. 5,851,937 A * 12/1998 Wu et al. ................... 442/394 * cited by examiner (21) Appl. No.: 10/388,426 (22) Filed: Mar 17, 2003 Primary Examiner Sabiha Qazi 9 (74) Attorney, Agent, or Firm-Isaac A. Angres (65) Prior Publication Data (57) ABSTRACT US 2003/0175222 A1 Sep. 18, 2003 The present invention provides biodegradable polyesters Related U.S. Application Data based on lower hydroxy acids and hydroxy fatty acids. The resulting polyesters are useful as cosmetic vehicles for (62) Division of application No. 09/805,894, filed on Mar. 15, Sunscreens, skin lotions and by themselves are also useful as 2001, now Pat.
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