US3700486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating filaments
Assignee: RTX Corp
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Filing: 1970-12-31
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Granted: 1972-10-24
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Expires: 1990-12-31
Abstract
Abstract A METHOD FOR CONTINUOUSLY COATING HIGH MODULUS, HIGH STRENGTH FILAMENTS HAVING A BORON OR SILICON CARBIDE SURFACE WITH A COMPLETE AND UNIFORM DUCTILE METAL MATRIX OVERCOAT OF ALUMINUM OR MAGNESIUM COMPRISING PASSING THE FILAMENT THROUGH A PAIR OF AXIALLY ALIGNED TUBLAR CONDUITS HAVING MATABLE END PORTIONS IMMERSED IN A MOLTEN BATH OF THE METAL MATRIX MATERIAL, THE END PORTIONS BEING INITIALLY CONJOINED TO PREVENT CONTACT OF THE FILAMENT WITH THE MOLTEN METAL, AND SEPARATING THE CONDUIT END PORTIONS A DISTANCE SUFFICIENT TO EXPOSE THE MOVING FILAMENT TO THE MOLTEN METAL AND CAUSE UNIFORM COATING THEREOF.
Inventors
- 👤 Richard D Veltri
- 👤 Asaph U Merriam
- 👤 Malcolm Basche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:15
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/04; C23; C23C; C23C2/00; C23C2/003; C23C2/0035; C23C2/0036; C23C2/00361; C23C2/04; C23C2/12; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |