US5041133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intraocular implant
Assignee: Pfizer Health AB
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Filing: 1987-05-26
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Granted: 1991-08-20
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Expires: 2007-05-26
Abstract
Abstract An intraocular implant having an optic lens and haptic for fixation of said lens in the posterior or anterior chamber of the eye, said implant having thermal stability sufficient to render said implant autoclave sterilizable, said implant being chemically stable when sterilized with high energy radiation, said optical lens consisting essentially of a solid thermoplastic polymer which is substantially transparent to visible light, is biocompatible, has a glass transition temperature of at least 120° C. and is thermally stable at a temperature of at least 120° C., and has a notched Izod impact strength at about one-eighth inch thickness of about at least one foot pound per inch, said thermoplastic polymer having repeating units of aromatic groups linked together by one or more of the following linkages: ether, ester, sulphone, carbonyl and imide.
Inventors
- 👤 Reizo Sayano
- 👤 Eugene P. Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1602; A61F2/1605; A61L; A61L27/00; A61L27/14; A61L27/50; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
An ocular implant, said implant having thermal stability sufficient to render said implant autoclave sterilizable, said implant having sufficient chemical stability for sterilization with high energy radiation, and consisting essentially of a thermoplastic polymer which is substantially transparent to visible light, is biocompatible, has a glass transition temperature of at least 120° C. and is thermally stable at a temperature of at least 120° C., and has a notched Izod impact strength at about one-eighth inch thickness of about at least one foot pound per inch, said thermoplastic polymer having repeating units of aromatic groups linked together by one or more linkages selected from the group consisting of ether, ester, carbonyl and imide.
Claim 2
Dependent Claim
113 words
An ocular implant, said implant having thermal stability sufficient to render said implant autoclave sterilizable, said implant having sufficient chemical stability for sterilization with high energy radiation, and consisting essentially of a thermoplastic polymer which is substantially transparent to visible light, is biocompatible, has a glass transition temperature of at least 120° C. and is thermally stable at a temperature of at least 120° C., and has a notched Izod impact strength at about one-eighth inch thickness of about at least one foot pound per inch, said thermoplastic polymer having repeating units of aromatic groups linked together by one or more linkages selected from the group consisting of ether, ester, carbonyl and imide.
Claim 3
Dependent Claim
19 words
An ocular implant according to claim 1 wherein said aromatic group is phenyl, biphenyl, naphthyl, anthracyl, phenathryl or alkylidenediphenyl.
Claim 4
Dependent Claim
13 words
The ocular implant according to claim 1 wherein said thermoplastic polymer is polycarbonate.
Claim 5
Dependent Claim
13 words
The ocular implant of claim 3 wherein the repeating aromatic groups are alkylidenediphenyl.
Claim 6
Dependent Claim
12 words
The ocular implant of claim 4 wherein said alkylidenediphenyl is para, para'-isopropylidenediphenol.
Claim 7
Dependent Claim
13 words
The ocular implant of claim 1 wherein said thermoplastic polymer is a polyarylate.
Claim 8
Dependent Claim
21 words
The ocular implant of claim 6 wherein the repeating units in said polyarylate are iso- and terephthalate and a para, para'-isopropylidenediphenol.
Claim 9
Dependent Claim
15 words
The ocular implant of claim 1 wherein said thermoplastic polymer has ether and imide linkages.
Claim 10
Dependent Claim
13 words
The ocular implant of claim 1 wherein said thermoplastic polymer has carbonyl linkages.
Claim 11
Dependent Claim
20 words
The ocular implant of claim 1 wherein said Izod impact strength is at least about four foot pounds per inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |