US5645665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraocular lens fabrication
Assignee: University of California
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Filing: 1995-05-26
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Granted: 1997-07-08
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Expires: 2015-05-26
Abstract
Abstract This invention describes a method for fabricating an intraocular lens maderom clear Teflon™, Mylar™, or other thermoplastic material having a thickness of about 0.025 millimeters. These plastic materials are thermoformable and biocompatable with the human eye. The two shaped lenses are bonded together with a variety of procedures which may include thermosetting and solvent based adhesives, laser and impulse welding, and ultrasonic bonding. The fill tube, which is used to inject a refractive filling material is formed with the lens so as not to damage the lens shape. A hypodermic tube may be included inside the fill tube.
Inventors
- 👤 Mike A. Salazar
- 👤 Larry R. Foreman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/02; B29D11/023; B29C; B29C65/00; B29C65/48; B29C66/00; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91411; B29C66/91441; B29C66/91443; B29C66/91445; B29C66/919; B29C65/02; B29C65/08; B29C65/14; B29C65/16; B29C65/38; B29C65/4805; B29C65/481; B29C65/482; B29C65/483; B29C65/4895; B29C66/71; B29C66/92; B29C66/929; B29C66/94; B29C66/949; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2067/00; B29L; B29L2007/00; B29L2007/008; B29L2011/00; B29L2011/0016; B29L2012/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A method of fabricating an intraocular lens, comprising the following steps: fastening a thin clear plastic film to a ring, placing said ring in a forming fixture that is capable of heating, forming the film into a lenticular shape with a longitudinal half section of a fill tube projecting therefrom, said forming fixture providing the proper optical finish for an intraocular lens, repeating the process to obtain a second lenticular shaped film with a longitudinal half section of a fill tube projecting therefrom, and bonding together the two shaped films to form a lens including a fill tube.
Claim 2
Independent Claim
98 words
A method of fabricating an intraocular lens, comprising the following steps: fastening a thin clear plastic film to a ring, placing said ring in a forming fixture that is capable of heating, forming the film into a lenticular shape with a longitudinal half section of a fill tube projecting therefrom, said forming fixture providing the proper optical finish for an intraocular lens, repeating the process to obtain a second lenticular shaped film with a longitudinal half section of a fill tube projecting therefrom, and bonding together the two shaped films to form a lens including a fill tube.
Claim 3
Dependent Claim
22 words
The method of claim 1 in which the clear plastic film is selected from the group consisting of polytetrafluoroethylene and polyalkylene terephthalate.
Claim 4
Dependent Claim
19 words
The method of claim 2 in which the said clear plastic film has a thickness of about 0.025 millimeters.
Claim 5
Dependent Claim
26 words
The method of claim 1 in which the clear plastic film is heated to above and about 150° C. so as to form a lenticular shape.
Claim 6
Dependent Claim
17 words
The method of claim 1 in which the fill tube has a diameter of about 0.8 mm.
Claim 7
Dependent Claim
29 words
The method of claim 1 in which the bonding is accomplished by a heat and pressure process selected from the group consisting of ultrasonic, impulse welding, and adhesive bonding.
Claim 8
Dependent Claim
17 words
The method of claim 1 in which a hypodermic tube is included inside the said fill tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |