Patent US3847156A successfully refreshed from Google Patents.
US3847156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suture
Assignee: Sherwood Medical Co
•
Filing: 1972-07-17
•
Granted: 1974-11-12
•
Expires: 1992-07-17
Abstract
Abstract A non-absorbable suture is provided which has a metallic multifilament core having a urethane polymer substantially filling the interstices between filaments, and an outer plastic coating covering and adhering to the urethane polymer. The suture may be prepared by impregnating a multi-filament core of stainless steel filaments, each of which may be about 25 microns in diameter, with a solution of urethane prepolymer and a solvent with a cure retardant. The prepolymer is cured in situ in an oven to produce a flexible urethane polymer, and then a plastic outer coating is applied which adheres to the polymer. The outer coating may be nylon in a solvent which leaves a coating upon evaporation of the solvent which is then fused to form a smooth outer surface.
Inventors
- 👤 W Trumble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:35
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/14; A61L17/145; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/298
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A SURGICAL SUTURE COMPRISING A CORE INCLUDING A PLURALITY OF METALLIC FILAMENTS, AN IMPREGNANT INCLUDING A FLEXIBLE URETHANE POLYMER IMPREGNATING SAID CORE AND FILLING ALL OF THE INTERSTICES BETWEEN SAID FILAMENTS FOR PREVENTING CAPILLARY TRANSMISSION OF INFECTUOUS FLUIDS ALONG THE SUTURE, AND AN OUTER FLEXIBLE PLASTIC COATING ADHERED TO SAID IMPREGNANT AND HAVING A SMOOTH OUTER SURFACE.
Claim 2
Dependent Claim
57 words
A SURGICAL SUTURE COMPRISING A CORE INCLUDING A PLURALITY OF METALLIC FILAMENTS, AN IMPREGNANT INCLUDING A FLEXIBLE URETHANE POLYMER IMPREGNATING SAID CORE AND FILLING ALL OF THE INTERSTICES BETWEEN SAID FILAMENTS FOR PREVENTING CAPILLARY TRANSMISSION OF INFECTUOUS FLUIDS ALONG THE SUTURE, AND AN OUTER FLEXIBLE PLASTIC COATING ADHERED TO SAID IMPREGNANT AND HAVING A SMOOTH OUTER SURFACE.
Claim 3
Dependent Claim
22 words
The surgical suture according to claim 1 wherein each of said filaments has a diameter between about 5 microns and 30 microns.
Claim 4
Dependent Claim
15 words
The surgical suture according to claim 2 wherein each of said filaments is stainless steel.
Claim 5
Dependent Claim
25 words
The surgical suture according to claim 1 wherein said urethane polymer comprises a polymerized in situ solution including a prepolymer of urethane and a solvent.
Claim 6
Dependent Claim
14 words
The surgical suture according to claim 4 wherein said solution includes a polymerization retardant.
Claim 7
Dependent Claim
12 words
The surgical suture according to claim 5 wherein said retardant is xylol.
Claim 8
Dependent Claim
16 words
The surgical suture according to claim 4 wherein said prepolymer comprises a polyester based aliphatic polyurethane.
Claim 9
Dependent Claim
13 words
The surgical suture according to claim 4 wherein said solvent comprises methyl cellosolve.
Claim 10
Dependent Claim
25 words
The surgical suture according to claim 4 wherein each of said filaments has a diameter less than 30 microns, and said plastic coating is nylon.
Claim 11
Dependent Claim
15 words
The surgical suture according to claim 1 wherein said plastic coating is a polyamide layer.
Claim 12
Dependent Claim
27 words
The surgical suture according to claim 1 wherein said plastic coating is a nylon terpolymer covering said impregnant and defining the radially outward surface of the suture.
Claim 13
Dependent Claim
16 words
The surgical suture according to claim 1 wherein said plastic coating is another urethane polymer layer.
Claim 14
Dependent Claim
20 words
The surgical suture according to claim 12 further comprising an outer nylon layer adheRing to said other urethane polymer layer.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |