Patent US3903347A successfully refreshed from Google Patents.
US3903347A
Expired / Lapsed
US
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Boron filament having a titanium carbide coated substrate
Assignee: RTX Corp
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Filing: 1973-12-26
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Granted: 1975-09-02
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Expires: 1993-12-26
Abstract
Abstract A filament for use in reinforcing composite materials includes a carbon substrate having a thin coating of titanium carbide covered by a relatively thick coating of boron. The titanium carbide coating permits the boron to be deposited on the carbon substrate in a uniform manner.
Inventors
- 👤 Francis S Galasso
- 👤 Bernarr A Jacob
- 👤 Robert B Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:08
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/28; C23C16/02; C23C16/0272; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/124; D01F11/126; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2942; Y10T428/2958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A COMPOSITE FILAMENT FOR USE IN FABRICATION OF FIBER REINFORCED ARTICLES COMPRISING: A FILAMENTARY SUBSTRATE CONSISTING ESSENTIALLY OF CARBON: A FIRST COATINING ON SAID SUBSTRATE CONSISTING ESSENTIALLY OF PYROLYTIC TITANIUM CARBIDE: AND A SECOND COATING OVER SAID FIRST COATING CONSISTING ESSENTALLY OF AMORPHOUS BORON, SAID BORON COATING BEING CONTINUOUS, NODE-FREE, OF SUBSTANTIALLY CONSTANT DIAMETER AND HAVING A THICKNESS OF GREATER THAN 0.6 MIL.
Claim 2
Dependent Claim
63 words
A COMPOSITE FILAMENT FOR USE IN FABRICATION OF FIBER REINFORCED ARTICLES COMPRISING: A FILAMENTARY SUBSTRATE CONSISTING ESSENTIALLY OF CARBON: A FIRST COATINING ON SAID SUBSTRATE CONSISTING ESSENTIALLY OF PYROLYTIC TITANIUM CARBIDE: AND A SECOND COATING OVER SAID FIRST COATING CONSISTING ESSENTALLY OF AMORPHOUS BORON, SAID BORON COATING BEING CONTINUOUS, NODE-FREE, OF SUBSTANTIALLY CONSTANT DIAMETER AND HAVING A THICKNESS OF GREATER THAN 0.6 MIL.
References Cited (Backward Citations)
US3120453A
Cited
US3679475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |