Patent US5389840A successfully refreshed from Google Patents.
Patent US3660044A successfully refreshed from Google Patents.
US3660044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for crucible-free zone melting of crystalline rods
Assignee: Siemens AG
•
Filing: 1969-06-25
•
Granted: 1972-05-02
•
Expires: 1989-06-25
Abstract
Abstract Apparatus for crucible-free zone melting a rod of crystalline material includes a melting chamber, axially displaceable and rotatable holders for supporting a stock rod to be recrystallized and a recrystallized rod mounted in the melting chamber, the holders having axes extending inclined or transversely to one another, and means for heating the stock rod so as to form a melting zone therein connecting the stock rod with the recrystallized rod.
Inventors
- 👤 Wolfgang Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:28
CPC Classifications
C; C30; C30B; C30B13/00; Y; Y10; Y10S; Y10S117/00; Y10S117/905; Y10S117/91; Y10T; Y10T117/00; Y10T117/10; Y10T117/1016; Y10T117/1024; Y10T117/1032; Y10T117/1068
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
Apparatus according to claim 1, wherein the axis of said recrystallized rod holder extends substantially vertically and said recrystallized rod holder is located at the bottom of said chamber, and said holder for the stock rod to be recrystallized is located in an upper part of said chamber.
Claim 2
Dependent Claim
50 words
Apparatus according to claim 1, wherein the axis of the holder for the stock rod to be recrystallized extends substantially vertically and said stock rod holder is located at the bottom of said chamber, and said holder for the recrystallized rod is located in an upper part of said chamber.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1, wherein the holders for the stock rod to be recrystallized and for the recrystallized rod are both located in an upper part of said melting chamber.
Claim 4
Dependent Claim
20 words
Apparatus according to claim 1, including at least one additional holder for a stock rod adjustable at varying feeding rate.
Claim 5
Dependent Claim
37 words
Apparatus according to claim 1, wherein said melting zone is in the form of a bend at substantially the intersection of said inclined axes and said heating means is located adjacent the outer side of said bend.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 1, wherein said heating means comprises a flat-wound inducTion coil having its windings disposed in one plane, said induction coil being adapted to be energized with high-frequency alternating current.
Claim 7
Dependent Claim
24 words
Apparatus according to claim 1, wherein said heating means comprises a substantially conically shaped induction coil adapted to be energized with high-frequency alternating current.
Claim 8
Dependent Claim
29 words
Apparatus according to claim 1, including at least one additional supporting coil for supporting said melting zone, said supporting coil being adapted to be energized with a high-frequency current.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 1, including means for preheating the stock rod and after-heating the recrystallized rod.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 1, wherein said heating means comprises an electron gun.
References Cited (Backward Citations)
US2739088A
Cited
DE1002741B
Cited
US2809905A
Cited
US2962363A
Cited
GB848382A
Cited
US2977258A
Cited
US2905798A
Cited
US3160478A
Cited
US3160497A
Cited
US3278274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |