Patent US5474532A successfully refreshed from Google Patents.
US5474532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting blade for a vitreous cutter
Assignee: Alcon Research LLC
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Filing: 1994-11-22
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Granted: 1995-12-12
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Expires: 2014-11-22
Abstract
Abstract A cutting blade for a rotary vitreous cutter having an opening separated by a cutting bar having two cutting edges so that one of the openings is always in communication with the cutting port in the outer tube of the vitreous cutter as the cutting blade rotates.
Inventors
- 👤 Dennis L. Steppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:11
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00763
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
A cutting blade assembly for a rotary vitreous cutter comprising, a. an outer tube; b. a thin, hollow inner tube having a distal end received within the outer tube; and c. at least two openings on the distal end separated by a cutting bar, the cutting bar being smaller than the openings.
Claim 2
Dependent Claim
52 words
A cutting blade assembly for a rotary vitreous cutter comprising, a. an outer tube; b. a thin, hollow inner tube having a distal end received within the outer tube; and c. at least two openings on the distal end separated by a cutting bar, the cutting bar being smaller than the openings.
Claim 3
Dependent Claim
13 words
The cutting blade assembly of claim 1 wherein the tubes comprise stainless steel.
Claim 4
Dependent Claim
12 words
The cutting blade assembly of claim 1 wherein the tubes comprise titanium.
Claim 5
Dependent Claim
14 words
The cutting blade assembly of claim 1 wherein the distal end contains three openings.
Claim 6
Dependent Claim
53 words
A cutting blade assembly for a rotary vitreous cutter comprising, a. an outer tube; b. a thin, hollow, metal inner tube having a distal end received within the outer tube; and c. three openings on the distal end separated by a plurality of cutting bars, the cutting bars being smaller than the openings.
Claim 7
Dependent Claim
53 words
A cutting blade assembly for a rotary vitreous cutter comprising, a. an outer tube; b. a thin, hollow, metal inner tube having a distal end received within the outer tube; and c. three openings on the distal end separated by a plurality of cutting bars, the cutting bars being smaller than the openings.
Claim 8
Dependent Claim
13 words
The cutting blade assembly of claim 5 wherein the tubes comprise stainless steel.
Claim 9
Dependent Claim
12 words
The cutting blade assembly of claim 5 wherein the tubes comprise titanium.
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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) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |