US3574649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing continuous boron filaments
Assignee: RTX Corp
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Filing: 1967-02-24
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Granted: 1971-04-13
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Expires: 1987-02-24
Abstract
Abstract A CHEMICAL DEPOSITION PROCESS FOR PRODUCING CONTINUOUS FILAMENTARY MATERIALS, SUCH AS BORON, BY REDUCING A DECOMPOSABLE GAS SUCH AS BORON TRICHLORIDE, ON A RESISTIVELY HEATED WIRE, THE WIRE BEING DRAWN THROUGH A REACTOR INCORPORATING REACTANT GAS INTRODUCITION AT BOTH ENDS THEREOF AND A CENTRAL EXHAUST TO THEREBY PROVIDE BOTH CONCURRENT AND COUNTERCURRENT FLOW CONDITIONS WITHIN THE REACTOR AND DIFFERING GAS COMPOSITIONS AT THE ENDS.
Inventors
- 👤 Roy Fanti
- 👤 Urban E Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:57
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/54; C23C16/545; C23C16/22; C23C16/28; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916
Claims Analysis
Total Claims: 0
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |