Patent US4564013A successfully refreshed from Google Patents.
US4564013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical filaments from vinylidene fluoride copolymers
Assignee: Ethicon Inc
•
Filing: 1984-05-24
•
Granted: 1986-01-14
•
Expires: 2004-05-24
Abstract
Abstract Surgical filaments are made from a copolymer of vinylidene fluoride and hexafluoropropylene.
Inventors
- 👤 Robert Lilenfeld
- 👤 Nicholas M. Popadiuk
- 👤 Peter Steinheuser
- 👤 Edgar Menezes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:08
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
34 words
A drawn and oriented surgical filament comprising a copolymer of vinylidene fluoride and hexafluoropropylene, wherein said copolymer contains from about 1 to about 15 weight percent polymerized hexafluoropropylene, the remainder being polymerized vinylidene chloride.
Claim 2
Dependent Claim
34 words
A drawn and oriented surgical filament comprising a copolymer of vinylidene fluoride and hexafluoropropylene, wherein said copolymer contains from about 1 to about 15 weight percent polymerized hexafluoropropylene, the remainder being polymerized vinylidene chloride.
Claim 3
Dependent Claim
15 words
The surgical filament of claim 1 wherein said filament is made entirely of said copolymer.
Claim 4
Dependent Claim
21 words
The surgical filament of claim 1 wherein said filament is made of a blend of said copolymer and vinylidene fluoride homopolymer.
Claim 5
Dependent Claim
20 words
The surgical filament of claim 1, 2, or 3 in the form of a sterile suture attached to a needle.
Claim 6
Dependent Claim
27 words
The surgical filament of claim 2 having the following properties: knot strength--above 35,000 psi straight tensile strength--above 50,000 psi break elongation--20 to 50% Young's modulus--below 300,000 psi.
Claim 7
Dependent Claim
26 words
The surgical filament of claim 5, wherein said copolymer contains from about 1 to about 15 weight percent polymerized hexafluoropropylene, the remainder being polymerized vinylidene fluoride.
Claim 8
Dependent Claim
33 words
The drawn and oriented surgical filament of claim 5, wherein the copolymer consists essentially of a random copolymer of about 10 weight percent polymerized hexafluoropropylene and about 90 weight percent polymerized vinylidene fluoride.
Claim 9
Dependent Claim
33 words
The drawn and oriented surgical filament of claim 5, wherein the copolymer consists essentially of a random copolymer of about 5 weight percent polymerized hexafluoropropylene and about 95 weight percent polymerized vinylidene fluoride.
Claim 10
Dependent Claim
33 words
The drawn and oriented surgical filament of claim 5, wherein the copolymer consists essentially of a random copolymer of about 13 weight percent polymerized hexafluoropropylene and about 87 weight percent polymerized vinylidene fluoride.
References Cited (Backward Citations)
US4052550A
Cited
US4353960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |