US5308576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molded anvils
Assignee: United States Surgical Corp
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Filing: 1991-10-18
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Granted: 1994-05-03
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Expires: 2011-10-18
Abstract
Abstract A method for making metal injection molded medical devices is disclosed. The method comprises melt blending, inject ion molding, and sintering a granulated hardenable metal feedstock.
Inventors
- 👤 David T. Green
- 👤 Henry Bolanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/22; B22F3/225; A; A61; A61B; A61B17/00; A61B17/068; A61B17/072; A61B17/07207; A61B2017/07214; B22F2998/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
62 words
A method for producing a metal injection molded medical device in the shape of a grasping member comprising: a. melt blending a feedstock, comprising a hardenable metal with a thermoplastic binder material; b. injection molding the feedstock in a mold configured and dimensioned to form a medical device; c. removing a majority of the binder material; and d. sintering the medical device.
Claim 2
Independent Claim
62 words
A method for producing a metal injection molded medical device in the shape of a grasping member comprising: a. melt blending a feedstock, comprising a hardenable metal with a thermoplastic binder material; b. injection molding the feedstock in a mold configured and dimensioned to form a medical device; c. removing a majority of the binder material; and d. sintering the medical device.
Claim 3
Dependent Claim
13 words
A method according to claim 1, wherein the melt blending process is extrusion.
Claim 4
Dependent Claim
14 words
A method according to claim 1, wherein the binder is removed by a solvent.
Claim 5
Dependent Claim
24 words
A method according to claim 3, wherein the solvent is selected from the group consisting of chloroform, methylene chloride, acetone, xylene, DMF and DMSO.
Claim 6
Dependent Claim
14 words
A method according to claim 1, wherein the binder is removed by thermal means.
Claim 7
Dependent Claim
22 words
A method according to claim 5, wherein the thermal means comprises a vacuum oven heated from about 1000 to about 2500° C.
Claim 8
Dependent Claim
20 words
A method according to claim 1, wherein the metal has an average particle size of up to about 10 microns.
Claim 9
Independent Claim
99 words
A method for producing a metal injection molded medical device comprising: a. melt blending a feedstock, comprising a hardenable metal with a thermoplastic binder material; b. injection molding the feedstock in a mold configured and dimensioned to form a medical device; c. removing a majority of the binder material; and d. sintering the medical device is in the shape of a member selected from the group consisting of an anvil, an anvil having a blank surface, an anvil having pockets configured in the shape of a rectangle, and an anvil having pockets configured in the shape of a star.
Claim 10
Independent Claim
99 words
A method for producing a metal injection molded medical device comprising: a. melt blending a feedstock, comprising a hardenable metal with a thermoplastic binder material; b. injection molding the feedstock in a mold configured and dimensioned to form a medical device; c. removing a majority of the binder material; and d. sintering the medical device is in the shape of a member selected from the group consisting of an anvil, an anvil having a blank surface, an anvil having pockets configured in the shape of a rectangle, and an anvil having pockets configured in the shape of a star.
Claim 11
Dependent Claim
17 words
A method according to claim 8, wherein the device has a major axis of about 7 inches.
Claim 12
Dependent Claim
17 words
A medical device produced by the method of claim 1 wherein the device is a grasping member.
Claim 13
Dependent Claim
32 words
A method according to claim 8, wherein said thermoplastic binder material further comprises a material selected from the group consisting of animal wax, china wax, wool wax, paraffin wax, and mixtures thereof.
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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) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |