Patent US4813954A successfully refreshed from Google Patents.
US4813954A
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Compression, deformation, dehydration method of fabrication and implantation of an expansile, hydrogel intraocular lens
Assignee: Individual
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Filing: 1987-10-09
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Granted: 1989-03-21
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Expires: 2007-10-09
Abstract
Abstract In the preparation of an expansile, polymeric, hydrogel intraocular lens for small-incision surgery to replace a damaged natural lens, the step of subjecting the polymeric lens material capable of reversible deformation to a compressive force during the drying to cause the disk to deform so that at least one dimension of the lens material decreased, permitting the lens to be inserted in its deformed configuration into the smaller possible wound. An expansile hydrogel intraocular lens material simultaneously reduced in size through dehydration and deformed from its original configuration by compressive forces so that at least one of the dimensions is decreased, said material in its deformed and dehydrated state being stable at room temperature and capable of being stored, shipped, and implanted without refrigeration.
Inventors
- 👤 Steven B. Siepser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:15
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
In the process of preparing an expansile hydrogel intraocular lens having a predetermined water level content and a predetermined shape for small incision implantation to replace a damaged natural lens in an otherwise functional eye of a patient, the concurrent steps of subjecting th lens to deformation by a compressive force and dehydration to a water level less than the said predetermined level so as to have at least one dimension of the lens decreased, whereupon the lens will hold its deformed shape and reduced size during storage, shipment, and implantation irrespective of temperature and upon rehydration with body fluids present in the eye, the lens will return to its predetermined shape and swell to its desired size.
Claim 2
Dependent Claim
118 words
In the process of preparing an expansile hydrogel intraocular lens having a predetermined water level content and a predetermined shape for small incision implantation to replace a damaged natural lens in an otherwise functional eye of a patient, the concurrent steps of subjecting th lens to deformation by a compressive force and dehydration to a water level less than the said predetermined level so as to have at least one dimension of the lens decreased, whereupon the lens will hold its deformed shape and reduced size during storage, shipment, and implantation irrespective of temperature and upon rehydration with body fluids present in the eye, the lens will return to its predetermined shape and swell to its desired size.
Claim 3
Dependent Claim
14 words
A dehydrated, deformed expansile hydrogel intraocular lens prepared as set forth in claim 1.
Claim 4
Dependent Claim
84 words
An expansile hydrogel intraocular lens material simultaneously reduced in size through dehydration and deformed from its original configuration by compressive forces so that at least one dimensions of the lens material is decreased, said lens material being characterized by returning to its original shape upon rehydration with body fluids following implantation in the eye and swelling to its desired size, said lens material in its deformed and dehydrated state being stable at room temperature and capable of being stored, shipped and implanted without refrigeration.
Claim 5
Dependent Claim
84 words
An expansile hydrogel intraocular lens material simultaneously reduced in size through dehydration and deformed from its original configuration by compressive forces so that at least one dimensions of the lens material is decreased, said lens material being characterized by returning to its original shape upon rehydration with body fluids following implantation in the eye and swelling to its desired size, said lens material in its deformed and dehydrated state being stable at room temperature and capable of being stored, shipped and implanted without refrigeration.
Claim 6
Dependent Claim
12 words
The lens material of claim 3 in the form of an oval.
Claim 7
Dependent Claim
14 words
The lens material of claim 3 having a diameter no greater than 3.2 mm.
References Cited (Backward Citations)
US4556998A
Cited
US4731079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |