US4444927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sucrose and/or lactose nucleating agents for the crystallization of polydioxanone
Assignee: Ethicon Inc
•
Filing: 1982-09-13
•
Granted: 1984-04-24
•
Expires: 2002-09-13
Abstract
Abstract Sucrose and/or lactose is employed as a nucleating agent in polydioxanone polymer in the preparation of absorbable shaped articles made from polydioxanone.
Inventors
- 👤 Emil Borysko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:22
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/04; A61L31/06; A61L31/14; A61L31/148; C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1545
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
Process for fabricating absorbable shaped articles of polydioxanone which comprises heating a mixture of polydioxanone with a small amount of a finely divided sucrose or lactose nucleating agent, to a temperature above the crystalline melting point of the polydioxanone, which temperature is below the melting temperature of the nucleating agent, shaping the molten polymer/nucleating agent mixture, and then cooling the mixture below the crystalline melting point of the polydioxanone, whereby an absorbable shaped article is formed containing the nucleating agent dispersed throughout the polymer.
Claim 2
Dependent Claim
84 words
Process for fabricating absorbable shaped articles of polydioxanone which comprises heating a mixture of polydioxanone with a small amount of a finely divided sucrose or lactose nucleating agent, to a temperature above the crystalline melting point of the polydioxanone, which temperature is below the melting temperature of the nucleating agent, shaping the molten polymer/nucleating agent mixture, and then cooling the mixture below the crystalline melting point of the polydioxanone, whereby an absorbable shaped article is formed containing the nucleating agent dispersed throughout the polymer.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said nucleating agent is sucrose.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the nucleating agent is lactose.
Claim 5
Dependent Claim
13 words
The process of claim 1, 2 or 3 wherein the polydioxanone is poly(p-dioxanone).
Claim 6
Dependent Claim
23 words
An absorbable shaped article comprising polydioxanone containing a small amount of a finely divided sucrose or lactose nucleating agent dispersed throughout said article.
Claim 7
Dependent Claim
23 words
An absorbable shaped article comprising polydioxanone containing a small amount of a finely divided sucrose or lactose nucleating agent dispersed throughout said article.
Claim 8
Dependent Claim
12 words
The absorbable shaped article of claim 5 wherein said polydioxanone is poly(p-dioxanone).
Claim 9
Dependent Claim
15 words
The absorbable shaped article of claim 5 or 6 wherein said nucleating agent is sucrose.
Claim 10
Dependent Claim
15 words
The absorbable shaped article of claim 5 or 6 wherein said nucleating agent is lactose.
References Cited (Backward Citations)
DE2144406A1
Cited
US4052988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |