Patent US3917852A successfully refreshed from Google Patents.
US4962003A
Expired / Lapsed
US
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Development of fusible alloy composites
Assignee: Individual
•
Filing: 1988-04-27
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Granted: 1990-10-09
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Expires: 2008-04-27
Abstract
Abstract In summary of this disclosure, the present invention provides novel metal matrix fibrous composites which can be used as a fusible core in molding plastics. Modifications are possible within the scope of this invention.
Inventors
- 👤 Yoon O. Lhymn
- 👤 Chang Lhymn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/007; B29; B29C; B29C33/00; B29C33/44; B29C33/52; C; C22; C22C; C22C47/00; C22C47/02; C22C47/04; C22C49/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A core for lost core plastic molding of hollow plastic parts, said core having strength sufficient to preclude deformation of the core during plastic molding and having a melting point low enough to permit melt out of the core without degrading the molded part, said core having good melt-flow behavior, said core consisting essentially of a major amount of an alloy of tin and one or more metals selected from the group consisting of lead, antimony, and bismuth and a minor amount of discreet short copper-coated iron or steel fibers dispersed in and bonded to said alloy, said fibers being flowable with the melted alloy during melt out of the core.
Claim 2
Dependent Claim
111 words
A core for lost core plastic molding of hollow plastic parts, said core having strength sufficient to preclude deformation of the core during plastic molding and having a melting point low enough to permit melt out of the core without degrading the molded part, said core having good melt-flow behavior, said core consisting essentially of a major amount of an alloy of tin and one or more metals selected from the group consisting of lead, antimony, and bismuth and a minor amount of discreet short copper-coated iron or steel fibers dispersed in and bonded to said alloy, said fibers being flowable with the melted alloy during melt out of the core.
Claim 3
Dependent Claim
36 words
The core of claim 1, wherein the material of said alloy consists of about 88 to about 99 wt. % tin and about 1 to 12 wt. % bismuth, which melts at about 200 degree C.
Claim 4
Dependent Claim
48 words
The core of claim 1, wherein the material for said alloy consists of about 3 to about 15 wt. % of lead, about 1 to about 12 wt. % of antimony, and about 80 to about 96 wt. % of tin, which melts at approximately 200 degree C.
Claim 5
Dependent Claim
37 words
The core of claim 1, wherein the material for said alloy consists of about 56 to about 59 wt. % bismuth and about 41 to about 44 wt. % tin, which melts at about 137±4 degree C.
Claim 6
Dependent Claim
25 words
The core for lost core plastic molding comprising a tin-based alloy matrix reinforced with discreet short strong copper-coated fibers compatible with the tin-based matrix alloy.
Claim 7
Dependent Claim
25 words
The core for lost core plastic molding comprising a tin-based alloy matrix reinforced with discreet short strong copper-coated fibers compatible with the tin-based matrix alloy.
Claim 8
Dependent Claim
70 words
A core alloy for cores for lost core plastic molding comprising a major amount of the alloy with one or more metals from the group consisting essentially of tin, lead, antimony, bismuth, plus a minor amount of copper-coated discreet short iron or steel fibers dispersed in and bonded to said alloy, said fibers being bonded to the alloy and flowable with the molten alloy during melt out of the core.
Claim 9
Dependent Claim
70 words
A core alloy for cores for lost core plastic molding comprising a major amount of the alloy with one or more metals from the group consisting essentially of tin, lead, antimony, bismuth, plus a minor amount of copper-coated discreet short iron or steel fibers dispersed in and bonded to said alloy, said fibers being bonded to the alloy and flowable with the molten alloy during melt out of the core.
References Cited (Backward Citations)
SU310764A1
Cited
US1628759A
Cited
US2281029A
Cited
US3166808A
Cited
US3622283A
Cited
US3605902A
Cited
US3638734A
Cited
US3864807A
Cited
FR2302346A1
Cited
JPS53123327A
Cited
JPS56123845A
Cited
JPS5789940A
Cited
US4341823A
Cited
JPS594940A
Cited
JPS59136215A
Cited
JPS6094323A
Cited
GB2165860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |