Patent US5068514A successfully refreshed from Google Patents.
US5068514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser polishing of lens surface
Assignee: Bausch and Lomb Inc
•
Filing: 1989-10-23
•
Granted: 1991-11-26
•
Expires: 2009-10-23
Abstract
Abstract A process for polishing a contact lens surface with a laser beam without substantial ablative photodecomposition and with the fluence of the laser beam being less than 0.3JCM -2 and the number of applied pulses greater than 200.
Inventors
- 👤 James G. Lunney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:21
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B23; B23K; B23K26/00; B23K26/352; B23K26/3568; B23K26/3576; B23K26/36; B23K26/361
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A process for smoothing of a lens surface, comprising the step of irradiating the surface of a lens with a laser beam, to cause a controlled level of melting of the lens surfaces, but without substantial ablative photo decomposition, whereby the surface of the lens is smoothed, and, wherein the fluence of the laser beam is less than 0.3 3JCM -2 and the number of laser shots is greater than 200.
Claim 2
Dependent Claim
71 words
A process for smoothing of a lens surface, comprising the step of irradiating the surface of a lens with a laser beam, to cause a controlled level of melting of the lens surfaces, but without substantial ablative photo decomposition, whereby the surface of the lens is smoothed, and, wherein the fluence of the laser beam is less than 0.3 3JCM -2 and the number of laser shots is greater than 200.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 wherein the fluence of the laser beam is less than 0.1 JCM -2 .
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1 wherein the lens is cut in a conventional lathing operation prior to being irradiated.
Claim 5
Dependent Claim
19 words
The process of claim 2, wherein the lens is cut in a conventional lathing operation prior to being irradiated.
References Cited (Backward Citations)
US4455893A
Cited
US4842782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |