US 10,835,240 B2 · High-strength multi-component suture

Abstract

A method for making an expanded, and optionally multi-component and/or colored PTFE monofilament is disclosed. The method includes forming a first paste by mixing a PTFE powder with a hydrocarbon solvent; forming an extrusion preform by pressing the first paste into a form; curing the extrusion preform by exposing the extrusion preform to a first temperature for a first time duration; forming a green monofilament by extruding the first paste through a die; expanding the green monofilament by exposing the green monofilament to a second temperature for a second time duration, the second time duration occurring after the first time duration; stretching the green monofilament substantially along a longitudinal axis of the green monofilament, the stretching the green monofilament occurring after the expanding the green monofilament; and sintering the green monofilament after the stretching the green monofilament.

Claims17

Dependent claims

A monofilament comprising:

a plurality of expanded polytetrafluoroethylene (PTFE) materials including a first PTFE material in contact with a second PTFE material along a first longitudinal interface of the monofilament, and a third PTFE material in contact with the second PTFE material along a second longitudinal interface of the monofilament,
the first PTFE material having a first color and defining a first outer surface of the monofilament,
the second PTFE material having a second color and defining a second outer surface of the monofilament,
the third PTFE material having a third color and defining a third outer surface of the monofilament,
the first color being different from the second color, and the third color being different from the first color and the second color.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/974,247Filed 8 May 2018 · division

Priority

29 Aug 2013

Published

US 2018/0250003 A16 Sep 2018

Granted

17 Nov 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification35 codes

A61B 17/06166
Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials: sutures
A61B 90/92
Identification means for patients or instruments, e.g. tags: coded with colour
A61L 17/04
Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters: non-resorbable materials
B29C 48/001
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor: combinations…

Family

Application61/871,709Us provisional application · filed 29 Aug 2013

Application14/471,716Parent of this division · filed 28 Aug 2014

US 2018/0250003 A1Pre-grant publication · published 6 Sep 2018

US 9,986,999 B2Parent of this division

US 2015/0066080 A1Published application

US 10,835,240 B2This patent

From the US filing history. Foreign family members aren’t listed.

High-strength multi-component suture

Life of this patent

High-strength multi-component suture

Life of this patent

Abstract

Claims17