Global Patent Index - EP 1080139 A1

EP 1080139 A1 2001-03-07 - PLASMA SURFACE TREATMENT OF SILICONE HYDROGEL CONTACT LENSES

Title (en)

PLASMA SURFACE TREATMENT OF SILICONE HYDROGEL CONTACT LENSES

Title (de)

OBERFLÄCHENBEHANDLUNG VON SILIKONHYDROGEL-KONTAKTLINSEN MITTELS EINES PLASMAS

Title (fr)

TRAITEMENT D'UNE SURFACE DE LENTILLE DE CONTACT AU PLASMA

Publication

EP 1080139 A1 (EN)

Application

EP 99918763 A

Priority

  • US 9908781 W
  • US 8433498 P

Abstract (en)

[origin: WO9957178A1] The present invention provides an optically clear, hydrophilic coating upon the surface of a silicone hydrogel lens by subjecting the surface of the lens to a process comprising plasma treatment, hydration, and heat sterilization that is controlled to result in a silicate-containing film having a mosaic pattern of projecting plates surrounded by fissures when viewing a 50x50 micron square AFM image in which the surface is nitrogen enriched compared to the pre-plasma treated lens.

IPC 1-7 (main, further and additional classification)

C08J 7/06; G02B 1/04

IPC 8 full level (invention and additional information)

G02C 7/04 (2006.01); C08J 7/00 (2006.01); C08J 7/04 (2006.01); C08J 7/06 (2006.01); C08J 7/12 (2006.01); G02B 1/04 (2006.01); G02B 1/10 (2006.01)

CPC (invention and additional information)

C08J 7/123 (2013.01); B82Y 15/00 (2013.01); G02B 1/043 (2013.01); C08J 2343/04 (2013.01); C08J 2383/04 (2013.01)

Citation (search report)

See references of WO 9957178A1

Designated contracting state (EPC)

DE ES FR GB IE IT

EPO simple patent family

WO 9957178 A1 19991111; AU 3660399 A 19991123; AU 740054 B2 20011025; BR 9910346 A 20010109; CA 2328898 A1 19991111; CN 1299388 A 20010613; EP 1080139 A1 20010307; ID 27989 A 20010503; JP 2002513948 A 20020514; TW 442538 B 20010623

INPADOC legal status


2007-11-30 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Document: HK 1038369

2002-09-25 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020315

2001-05-30 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010412

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001020

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IE IT