US4557264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical filament from polypropylene blended with polyethylene
Assignee: Ethicon Inc
•
Filing: 1984-04-09
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Granted: 1985-12-10
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Expires: 2004-04-09
Abstract
Abstract Surgical filaments such as sutures and ligatures are made from a blend of polypropylene and linear low density polyethylene.
Inventors
- 👤 Bernhard Hinsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:30
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
A drawn and oriented, strong and compliant, surgical filament comprising a physical blend of polypropylene and linear low density polyethylene, wherein the filament contains from about 0.1 to 25 weight percent linear low density polyethylene, based on weight of polyethylene plus polypropylene.
Claim 2
Dependent Claim
42 words
A drawn and oriented, strong and compliant, surgical filament comprising a physical blend of polypropylene and linear low density polyethylene, wherein the filament contains from about 0.1 to 25 weight percent linear low density polyethylene, based on weight of polyethylene plus polypropylene.
Claim 3
Dependent Claim
10 words
The surgical filament of claim 1 attached to a needle.
Claim 4
Dependent Claim
37 words
The surgical filament of claim 1 having the following properties: ______________________________________
tensile strength 350 to 900 N/mm.sup.2
intrinsic knot strength
300 to 800 N/mm.sup.2
break elongation 23 to 53 percent
flexural modulus 1200 to 5000
N/mm.sup.2
______________________________________
Claim 5
Dependent Claim
31 words
The surgical filament of claim 1, 2, or 3, wherein the filament contains from about 1 to 16 weight percent linear low density polyethylene, based on weight of polyethylene plus polypropylene.
Claim 6
Dependent Claim
12 words
The surgical filament of claim 1, 2, or 3 in sterile condition.
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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |