Patent US4074713A successfully refreshed from Google Patents.
US4074713A
Expired / Lapsed
US
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Poly(N-acetyl-D-glucosamine) products
Assignee: Wyeth Holdings LLC
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Filing: 1976-07-22
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Granted: 1978-02-21
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Expires: 1996-07-22
Abstract
Abstract Poly(N-acetyl-D-glucosamine) is soluble in hexafluoroisopropyl alcohol and hexafluoracetone sesquihydrate. The solutions formed may be wet or dry spun into filaments, or cast into films or solid articles, which may be used as absorbable surgical sutures, or other absorbable surgical elements. Poly(N-acetyl-D-glucosamine) is enzymatically degradable in living tissue, and is resistant to hydrolytic degradation, and, therefore, surgical elements thereof have good storage characteristics under a wide variety of conditions.
Inventors
- 👤 Richard Carl Capozza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:02
CPC Classifications
D; D01; D01F; D01F9/00; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L27/00; A61L27/14; A61L27/20; C; C08; C08L; C08L5/00; C08L5/08; Y; Y10; Y10S; Y10S606/00; Y10S606/907; Y10S606/908; Y10S606/91
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A bone pin for the fixture of severed bone ends during regeneration after a traumatic or surgical fracture consisting essentially of a pin of poly(N-acetyl-D-glucosamine) of a diameter to fit into the medullary canal of a fractured bone end, either of natural size, or as drilled to a larger size, and a length of at least three times its diameter, whereby the bone pin is adapted to be a drive or friction fit in each bone end. so that the bone ends are held in fixed relationship in juxtaposition during regeneration of the bone, and the poly(N-acetyl-D-glucosamine) bone pin is later absorbed by the body fluids, permitting regeneration of marrow in the medullary canal.
Claim 2
Dependent Claim
114 words
A bone pin for the fixture of severed bone ends during regeneration after a traumatic or surgical fracture consisting essentially of a pin of poly(N-acetyl-D-glucosamine) of a diameter to fit into the medullary canal of a fractured bone end, either of natural size, or as drilled to a larger size, and a length of at least three times its diameter, whereby the bone pin is adapted to be a drive or friction fit in each bone end. so that the bone ends are held in fixed relationship in juxtaposition during regeneration of the bone, and the poly(N-acetyl-D-glucosamine) bone pin is later absorbed by the body fluids, permitting regeneration of marrow in the medullary canal.
Claim 3
Dependent Claim
70 words
A bone reinforcing plate of poly(N-acetyl-D-glucosamine) having high flexural strength and modulus, and a physical size of at least 1/16 inch by 1/4 inch by 1 inch, and shaped to conform generally to the surface configuration of a bone, said plate having holes therein adapted to receive fasteners to hold the plate in adjacent reinforcing configuration to living bone, during a healing process, and later be absorbed by living tissue.
Claim 4
Dependent Claim
70 words
A bone reinforcing plate of poly(N-acetyl-D-glucosamine) having high flexural strength and modulus, and a physical size of at least 1/16 inch by 1/4 inch by 1 inch, and shaped to conform generally to the surface configuration of a bone, said plate having holes therein adapted to receive fasteners to hold the plate in adjacent reinforcing configuration to living bone, during a healing process, and later be absorbed by living tissue.
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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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |