Patent US4732150A successfully refreshed from Google Patents.
US4732150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cataract extraction
Assignee: Individual
•
Filing: 1986-06-10
•
Granted: 1988-03-22
•
Expires: 2006-06-10
Abstract
Abstract A process and device for inserting a wire loop around the lens nucleus and then constricting the loop. The constricting loop divides the nucleus in half (or thirds, fourths, etc.), thus allowing it to be removed through an incision of approximately 6.5 mm.
Inventors
- 👤 Gerald T. Keener Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:51
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056; A61F; A61F9/00; A61F9/007; A61F9/00736
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
In a process for removing a cataract including the steps of: (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera; (b) making a puncture wound into the anterior chamber of the eye; (c) enlarging the puncture wound to provide a larger incision; (d) removing the anterior capsule from the cataract; and, (e) displacing the nucleus into the anterior chamber; the improvement which comprises the steps of: suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and cutting the nucleus in multiple sections by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
Claim 2
Dependent Claim
125 words
In a process for removing a cataract including the steps of: (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera; (b) making a puncture wound into the anterior chamber of the eye; (c) enlarging the puncture wound to provide a larger incision; (d) removing the anterior capsule from the cataract; and, (e) displacing the nucleus into the anterior chamber; the improvement which comprises the steps of: suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and cutting the nucleus in multiple sections by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein the steps of enlarging said puncture wound is accomplished by enlarging the wound until said incision has a chord length of approximately 6.5 mm.
Claim 4
Dependent Claim
129 words
In a process for removing a cataract including the steps of: (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera; (b) making a puncture wound into the anterior chamber of the eye; (c) enlarging the puncture wound to provide a larger incision; (d) removing the anterior capsule from the cataract; and, (e) displacing the nucleus into the anterior chamber; the improvement which comprises the steps of: suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and, dividing the nucleus in multiple sections with a wired instrument by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
Claim 5
Dependent Claim
129 words
In a process for removing a cataract including the steps of: (a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera; (b) making a puncture wound into the anterior chamber of the eye; (c) enlarging the puncture wound to provide a larger incision; (d) removing the anterior capsule from the cataract; and, (e) displacing the nucleus into the anterior chamber; the improvement which comprises the steps of: suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and, dividing the nucleus in multiple sections with a wired instrument by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.
Claim 6
Dependent Claim
30 words
The process of claim 3 wherein the steps of enlarging said puncture wound is accomplished by enlarging the wound until said incision has a chord length of approximately 6.5 mm.
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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |