Patent US3861450A successfully refreshed from Google Patents.
US3861450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An improved method of formation of filament directly from molten material
Assignee: Battelle Development Corp
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Filing: 1973-04-06
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Granted: 1975-01-21
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Expires: 1993-04-06
Abstract
Abstract A method of making filamentary solid material by contacting the surface of a pool of molten material with a circumferential projection comprising a portion of a rotating heat-extracting member is improved if the point of entrance of the projection into the molten surface is protected by surrounding the entrance point with a nonoxidizing gas. A preferred embodiment of the present invention would additionally include a means of buffing the circumferential projection at a point subsequent to the spontaneous release of the filament formed thereon.
Inventors
- 👤 Carroll E Mobley
- 👤 Robert E Maringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:53
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0611; B22D11/0614; B22D11/005; B22D11/0637; B22D11/0697
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
In a method of making solid filamentary material from a poollike source of molten material by contacting the surface of said molten material with at least one circumferential projection comprising the edge of a rotating, heat-extracting member the improvement of: maintaining a non-oxidizing atmosphere adjacent the point where said edge enters the surface of said molten material by covering said molten material with a solid cover consisting at least partially of solid carbon disposed to remove oxygen from the atmosphere adjacent said cover.
Claim 2
Dependent Claim
83 words
In a method of making solid filamentary material from a poollike source of molten material by contacting the surface of said molten material with at least one circumferential projection comprising the edge of a rotating, heat-extracting member the improvement of: maintaining a non-oxidizing atmosphere adjacent the point where said edge enters the surface of said molten material by covering said molten material with a solid cover consisting at least partially of solid carbon disposed to remove oxygen from the atmosphere adjacent said cover.
Claim 3
Dependent Claim
19 words
The method of claim 1 where said cover is heated in order to get said cover to absorb oxygen.
Claim 4
Dependent Claim
12 words
The method of claim 1 where said cover consists essentially of graphite.
Claim 5
Dependent Claim
12 words
The method of claim 3 where said molten material is a metal.
Claim 6
Dependent Claim
12 words
The method of claim 4 where said metal consists essentially of iron.
Claim 7
Dependent Claim
21 words
The method of claim 1 including the step of partially enclosing said rotating member and introducing a gas to said enclosure.
Claim 8
Dependent Claim
49 words
The method of claim 6 where said cover consists essentially of graphite, said molten material is a metal and the gas introduced to said enclosure is substantially inert both to said metal in its molten state and said graphite cover at the elevated operating temperature of said graphite cover.
Claim 9
Dependent Claim
36 words
The method of claim 7 where said graphite cover is heated by the combination of radiant energy from the adjacent molten material and the coupling with the induction heating system used to heat said molten material.
Claim 10
Dependent Claim
24 words
The method of claim 1 including the step of locally impinging a nonoxidizing gas on the point where said edges enters said molten material.
Claim 11
Dependent Claim
24 words
The method of claim 9 where said non-oxidizing gas is introduced to the region between said cover and the surface of said molten material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |