US3765843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growth of tubular crystalline bodies
Assignee: Saint Gobain Ceramics and Plastics Inc
•
Filing: 1971-07-01
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Granted: 1973-10-16
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Expires: 1991-07-01
Abstract
Abstract The invention is a method and apparatus for producing composite materials and monocrystalline capillary tubes. Monocrystalline bodies of a material such as alumina are grown from a melt about small diameter, high temperature wires or filaments so as to form high strength composites. The small wires or filaments may be removed from the composites so as to leave monocrystalline bodies with capillary size openings therein.
Inventors
- 👤 H Labelle
- 👤 J Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:44
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/34; C30B29/00; C30B29/60; C30B29/66; Y; Y10; Y10S; Y10S117/00; Y10S117/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
Method of claim 1 wherein said wire and said hole are both circular in cross-section.
Claim 2
Dependent Claim
11 words
Method of claim 1 wherein said wire is a flat ribbon.
Claim 3
Dependent Claim
30 words
Method of claim 1 wherein said material is alumina and said surface and said wire are made of a material from the class consisting of molybdenum, tungsten, iridium and rhenium.
Claim 4
Dependent Claim
31 words
Method of claim 1 wherein said additional quantities of said material are supplied to said surface from a reservoir of melt of said material disposed below the level of said surface.
Claim 5
Dependent Claim
23 words
Method of claim 1 wherein said additional quantities of said material are supplied to said surface via a capillary opening into said surface.
Claim 6
Dependent Claim
19 words
Method of claim 1 wherein said additional quantities of said material are supplied to said surface via said hole.
Claim 7
Dependent Claim
165 words
Method of producing a substantially monocrystalline body comprising inserting at least one wire through a hole in a substantially horizontal surface that has a predetermined edge configuration, establishing on said surface a liquid film of a selected material that has a lower melting point than said wire and is crystalline when in solid form and growing a substantially monocrystalline body of said material from said film with said body surrounding and gripping said at least one wire, pulling said body vertically away from said film at a speed consistent with the rate of crystal growth in a vertical direction so that successive portions of said at least one wire are surrounded and gripped by successive accretions of crystal growth on said body, feeding additional quantities of said material in liquid form to said surface via a hole in said surface to replenish and maintain said film as said body is pulled vertically, and terminating crystal growth after said body has grown to a desired length.
Claim 8
Dependent Claim
26 words
Method according to claim 8 wherein said material is alumina and said at least one wire is made of a material that is wet by alumina.
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |