US4950258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic molded articles with shape memory property
Assignee: JMS Co Ltd
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Filing: 1989-01-25
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Granted: 1990-08-21
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Expires: 2009-01-25
Abstract
Abstract Plastic molded articles having characteristic properties of both shape-memory and biodegradability and a process for preparing the same are disclosed. The molded products consist of homopolymers of lactide or glycolide or copolymers of lactide and glycolide. The molded articles of this invention are particularly useful for a variety of medical devices.
Inventors
- 👤 Tatsuya Kawai
- 👤 Takashi Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:30
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/92; A61B; A61B17/00; A61B17/02; A61B17/064; A61B17/0644; A61B17/08; A61B17/12; A61B17/122; A61B17/1227; A61F2/94; A61L; A61L31/00; A61L31/04; A61L31/06; A61L31/14; A61M; A61M31/00; A61M31/002; B; B29; B29C; B29C61/00; B29C61/003; C; C08; C08L; C08L67/00; C08L67/04; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30092; A61F2210/00; A61F2210/0004; A61F2210/0014; A61F2210/0019; A61L2400/00; A61L2400/16; Y; Y10; Y10S; Y10S264/00; Y10S264/40; Y10S264/41
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A molded article which can be returned to a previously memorized shape, consisting essentially of polymers selected from the group consisting of lactide homopolymers, glycolide homopolymers and copolymers of lactide and glycolide, said polymers having a shape memory property.
Claim 2
Dependent Claim
39 words
A molded article which can be returned to a previously memorized shape, consisting essentially of polymers selected from the group consisting of lactide homopolymers, glycolide homopolymers and copolymers of lactide and glycolide, said polymers having a shape memory property.
Claim 3
Dependent Claim
20 words
A molded article according to claim 1, wherein said polymers are copolymers containing 10-90 mol.% lactide and 90-10 mol.% glycolide.
Claim 4
Dependent Claim
20 words
A molded article according to claim 1 wherein said polymers are copolymers containing 20-80 mol.% lactide and 80-20 mol.% glycolide.
Claim 5
Dependent Claim
16 words
A molded article according to claim 1 wherein the article is a clip for tissue suturing.
Claim 6
Dependent Claim
18 words
A molded article according to claim 1, wherein the article is a device for preventing blood vessel obstruction.
Claim 7
Dependent Claim
19 words
A molded article according to claim 1, wherein the article is a device for expanding a restricted blood vessel.
Claim 8
Dependent Claim
21 words
A molded article according to claim 1, wherein the article is an actuator for releasing a drug from a medical capsule.
Claim 9
Dependent Claim
17 words
A molded article according to claim 1, wherein the article is a clip for a cerebral aneurysm.
Claim 10
Dependent Claim
22 words
A molded article according to claim 1, wherein the article comprises rings for attachment to the ends of an artificial blood vessel.
Claim 11
Dependent Claim
14 words
A molded article according to claim 1, wherein the article is a hemostatic clip.
Claim 12
Dependent Claim
61 words
A process for preparing a molded article according to claim 1, comprising the steps of: molding a polymer selected from the groups consisting of lactide homopolymers, glycolide homopolymers and copolymers of lactide and glycolide into an article of a desired shape; deforming the molded article into another shape by heat-softening; and cooling the deformed article to cause the article to harden.
Claim 13
Dependent Claim
83 words
A process for preparing a molded article according to claim 1, comprising the steps of: molding a polymer selected from the lactide homopolymers, glycolide homopolymers and copolymers of lactide and glycolide into an article of a desired shape; heating the article in the desired shape for a prescribed period of time; cooling the article; deforming the molded article into another shape by heat softening at a temperature lower than said first heating; and cooling the deformed article to cause the article to harden.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |