(12) United States Patent (10) Patent No.: US 6,706,855 B1 Collins Et Al
USOO6706855B1 (12) United States Patent (10) Patent No.: US 6,706,855 B1 Collins et al. (45) Date of Patent: Mar. 16, 2004 (54) ANTIMICROBIAL POLYMER (56) References Cited (75) Inventors: Andrew Neale Collins, Manchester U.S. PATENT DOCUMENTS (GB); Brian David Bothwell, 5,235,045 A 8/1993 Lewis et al. Manchester (GB); Graham John 5,498,547 A 3/1996 Blake et al. McPherson, Manchester (GB) FOREIGN PATENT DOCUMENTS (73) Assignee: Avecia Limited, Manchester (GB) JP 56 167383 A 12/1981 SU 619 489 A 7/1978 (*) Notice: Subject to any disclaimer, the term of this WO WO 94/09357 4/1994 patent is extended or adjusted under 35 WO WO 94/09360 4/1994 U.S.C. 154(b) by 40 days. WO WO 98/02492 1/1998 (21) Appl. No.: 10/070,152 OTHER PUBLICATIONS (22) PCT Filed: Jul. 25, 2000 S.C. Chang et al., Bioorg. Med. Chem. Lett. (1993) vol. 3, (86) PCT No.: PCT/GB00/02864 No. 4, pp. 555-556. S371 (c)(1), Primary Examiner Duc Truong (2), (4) Date: Mar. 4, 2002 (74) Attorney, Agent, or Firm- Pillsbury Winthrop LLP (87) PCT Pub. No.: WO01/17356 (57) ABSTRACT An antimicrobial polymer, characterised in that it carries a PCT Pub. Date: Mar. 15, 2001 covalently bound chromophoric marker. The antimicrobial (30) Foreign Application Priority Data polymer is preferably a cationic antimicrobial polymer, especially a poly(hexamethylenebiguanide). Also claimed Sep. 3, 1999 (GB) ............................................. 992O774 are compositions containing the antimicrobial polymer, a (51) Int. Cl." ......................... C08G 73/00; CO8G 73/06 method for treating a medium using the antimicrobial poly (52) U.S.
[Show full text]