Patent US3860443A successfully refreshed from Google Patents.
US3860443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite composite
Assignee: Fiber Materials Inc
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Filing: 1973-03-22
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Granted: 1975-01-14
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Expires: 1993-03-22
Abstract
Abstract A novel graphite fiber/metal composite material, the graphite fibers having a coat of titanium boride which may be mixed with titanium carbide. The coat, which promotes wetting by metals such as aluminum, copper and lead, is formed by an intermediate temperature vapor deposition technique involving the reduction with zinc vapor of a mixture of gaseous titanium and boron halides.
Inventors
- 👤 Walter L Lachman
- 👤 Robert A Penty
- 👤 Apul F Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:54
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/507; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C22; C22C; C22C49/00; C22C49/14; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/38; C23C16/56; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12486
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
METHOD OF FORMING A FIBER-METAL COMPOSITE, COMPRISING THE STEPS OF: FORMING A COATING OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM BORIDE, AND A MIXTURE OF TITANIUM BORIDE AND TITANIUM CARBIDE ON A PLURALITY OF CARBON FIBERS; IMMERSING THE COATED FIBERS INTO A BODY OF MOLTEN METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, LEAD, ZINC, COPPER, ALUMINUM, TIN AND ALLOYS OF SAID METALS UNTIL SAID METAL SUBSTANTIALLY FILLS THE INTERSTICES BETWEEN SAID FIBERS; AND COOLING THE METAL BODY WITH SAID COATED FIBERS EMBEDDED THEREIN TO A TEMPERATURE AT WHICH SAID METAL SOLIDIFIES.
Claim 2
Dependent Claim
94 words
METHOD OF FORMING A FIBER-METAL COMPOSITE, COMPRISING THE STEPS OF: FORMING A COATING OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM BORIDE, AND A MIXTURE OF TITANIUM BORIDE AND TITANIUM CARBIDE ON A PLURALITY OF CARBON FIBERS; IMMERSING THE COATED FIBERS INTO A BODY OF MOLTEN METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, LEAD, ZINC, COPPER, ALUMINUM, TIN AND ALLOYS OF SAID METALS UNTIL SAID METAL SUBSTANTIALLY FILLS THE INTERSTICES BETWEEN SAID FIBERS; AND COOLING THE METAL BODY WITH SAID COATED FIBERS EMBEDDED THEREIN TO A TEMPERATURE AT WHICH SAID METAL SOLIDIFIES.
Claim 3
Dependent Claim
22 words
Method as defined in claim 1 wherein said coated fibers are immersed in said body of molten metal at ambient atmospheric pressure.
Claim 4
Dependent Claim
40 words
Method as defined in claim 1 wherein the step of coating includes the reduction of a gaseous compound of titanium in the presence of said fibers whereby said titanium boride or mixture of titanium boride and titanium carbide is produced.
Claim 5
Dependent Claim
29 words
Method as defined in claim 3 wherein the step of coating is effected by reducing with zinc vapor a gaseous compound of titanium in the presence of said fibers.
Claim 6
Dependent Claim
32 words
Method as defined in claim 3 wherein the step of coating is effected by reducing a gaseous compound of boron and a gaseous compound of titanium in the presence of said fibers.
Claim 7
Dependent Claim
35 words
Method as defined in claim 3 wherein the step of coating is effected by reducing with zinc vapor a gaseous compound of boron and a gaseous compound of titanium in tHe presence of said fibers.
Claim 8
Dependent Claim
11 words
Method as defined in claim 1 wherein said metal is aluminum.
Claim 9
Dependent Claim
39 words
Method as defined in claim 5 wherein said step of coating is effected for a time sufficient to deposit on each of said fibers a layer having a thickness in the range between about 100 to 10, 000 A.
Claim 10
Dependent Claim
40 words
Method as defined in claim 5 wherein the relative proportion of said compound of boron to said compound of titanium is sufficiently large so that the titanium boride formed in said layer upon reduction of said compounds is substantially TiB2.
Claim 11
Dependent Claim
39 words
Method as defined in claim 5 wherein the relative proportion of said compound of boron to said compound of titanium is small enough that the titanium boride formed in said layer upon reduction of said compounds is substantially TiB.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |