Patent FR1604898A successfully refreshed from Google Patents.
US2775809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing of molybdenum and tungsten and brazed structures produced thereby
Assignee: Borolite Corp
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Filing: 1952-05-13
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Granted: 1957-01-01
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Expires: 1972-05-13
Abstract
No abstract record available.
Inventors
- 👤 Steinitz Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:14
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B23K1/00; B23K1/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
IN A PROCESS OF BRAZING A PART CONSISTING ESSENTIALLY OF A METAL SELECTAED FROM THE CLASS CONSISTING OF MOLYBDENUM AND TUNGSTEN TO A PART CONSISTING ESSENTIALLY OF A METAL SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM, TUNGSTEN AND TANTALUM, THE PROCEDURE COMPRISING APPLYING TO AREAS OF THE METAL PARTS TO BE UNITED BY BRAZING A POWDER OF MOLYBDENUM BVORIDE CORRESPONDING TO MO2B AND CONTAINING 3-7% BORON BY WEIGHT, HOLDING THE PARTS TOGETHER AND HEATING THE CONTACTING AREAS TO BE UNITED AND THE POWDER APPLIED THERETO TO A TEMPERATURE BETWEEN ABOUT 1900 TO 2100*C. IN THE ABSENCE OF AN OXIDIZING MEDIUM ATA WHICH TEMPERATURE SAID POWDER MELTS AND WETS THE HEATING METAL PARTS.
Claim 2
Dependent Claim
112 words
IN A PROCESS OF BRAZING A PART CONSISTING ESSENTIALLY OF A METAL SELECTAED FROM THE CLASS CONSISTING OF MOLYBDENUM AND TUNGSTEN TO A PART CONSISTING ESSENTIALLY OF A METAL SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM, TUNGSTEN AND TANTALUM, THE PROCEDURE COMPRISING APPLYING TO AREAS OF THE METAL PARTS TO BE UNITED BY BRAZING A POWDER OF MOLYBDENUM BVORIDE CORRESPONDING TO MO2B AND CONTAINING 3-7% BORON BY WEIGHT, HOLDING THE PARTS TOGETHER AND HEATING THE CONTACTING AREAS TO BE UNITED AND THE POWDER APPLIED THERETO TO A TEMPERATURE BETWEEN ABOUT 1900 TO 2100*C. IN THE ABSENCE OF AN OXIDIZING MEDIUM ATA WHICH TEMPERATURE SAID POWDER MELTS AND WETS THE HEATING METAL PARTS.
Claim 3
Dependent Claim
104 words
A COMPOSITE ARTICLE COMPRISING A FIRST METAL PART SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM AND TANTALUM, AND A SECOND METAL PARTA SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM, TUNGSTEN AND TANTALUM, SAID PARTS BEING UNITED BY A BRAZE OF ,OLYBDENUM BORIDE CORRESPONDING TO MO2B AND CONTAINING 3-7% BORON BY WEIGHT, WHICH BRAZE AND METAL PORTIONS JOINED BY SAID BRAZE WERE HEATED TO A TEMPERATURE BETWEEN ABOUT 1900* TO 2100* C. AT WHICH TH ECOMPOSITION OF SAID BRAZE WAS MOLTEN AND HAS WETTED SAID JOIED METAL PORTIONS, SAID PARTS REMAINING UNITED AND BEING CAPABLE OF WITHSTANDING TEMPERATURE OF UP TO ABOUT 1800*C. WITHOUT PARTING.
Claim 4
Dependent Claim
104 words
A COMPOSITE ARTICLE COMPRISING A FIRST METAL PART SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM AND TANTALUM, AND A SECOND METAL PARTA SELECTED FROM THE CLASS CONSISTING OF MOLYBDENUM, TUNGSTEN AND TANTALUM, SAID PARTS BEING UNITED BY A BRAZE OF ,OLYBDENUM BORIDE CORRESPONDING TO MO2B AND CONTAINING 3-7% BORON BY WEIGHT, WHICH BRAZE AND METAL PORTIONS JOINED BY SAID BRAZE WERE HEATED TO A TEMPERATURE BETWEEN ABOUT 1900* TO 2100* C. AT WHICH TH ECOMPOSITION OF SAID BRAZE WAS MOLTEN AND HAS WETTED SAID JOIED METAL PORTIONS, SAID PARTS REMAINING UNITED AND BEING CAPABLE OF WITHSTANDING TEMPERATURE OF UP TO ABOUT 1800*C. WITHOUT PARTING.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |