US3903585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of brazing
Assignee: Individual
•
Filing: 1972-04-27
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Granted: 1975-09-09
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Expires: 1992-04-27
Abstract
Abstract Infusible metal alloys are employed both as a parts material and as a brazing spelter for the connection of various parts and components made of materials based upon infusible metals and compounds, ceramics, graphite and the like. The alloys are based upon hafnium to which is added some elements selected from the subgroup B of the first group of the periodic system and some elements featuring melting points lying above 600*C and selected from the third to eighth groups of the periodic system.
Inventors
- 👤 Valentin Petrovich Kosteruk
- 👤 Mikhail Savvich Kovalchenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; C04B37/003; C04B37/006; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/36; C04B2237/363; C04B2237/40; C04B2237/403; C04B2237/50; C04B2237/56; C04B2237/567
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A METHOD OF BRAZING CARBIDES, BORIDES, NITRIDES, SILICIDES AND CERAMICS TO EACH OTHER AND TO HIGH MELTING METALS COMPRISING BRAZING SAID MATERIALS IN THE PRESENCE OF A BAZING COMPOSITION CONSISTING ESSENTIALLY OF AN ALLOY CONSISTING ESSENTIALLY OF A MAJOR PROPORTION BY WEIGHT OF HAFNIUM, A FIRST ADDITIVE COMPONEN SELECTED FROM THE GROUP ONSISTING OF COPPER, GOLD, SILVER AND MIXTURES THEREOF, IN AN AMOUNT OF FROM 2 TO 30 PERCENT OF TH ALLOY WEIGHT, AND A SECOND ADDITIVE COMPONENT SELECTED FROM THE GROUP CONSISTING OF BORON, ALUMINUM, SCANDIUM, YYTTRIUM, LANTHANIDES, CARBON, SILICON, GERMANIUM, TITANIUM, ZIRCONIUM, VANADIUM, NIOBIUM, TANTALUM, PHOSPHOROUS, CROMIUM MOLYBDENUM, TUNGSTEN, MANGAESE, TECHNETIUM, RHENIUM, RUTHENIUM, OSMIUM, COBALT, NICKEL, RHODIUM, PALLADIUM, IRIDIUM, AND PLANTIUM, IN AN AMOUNT OF 2 TO 21 PERCENT OF THE ALLOY WEIGHT WHEREIN SAID ALLOY IS APPLIED AS PATICLES TO THE SURFACE OF THE MATERIALS TO BE BRAZED, SAID PARTICLES HAVING A PACTICLE SIZE OF AT LEAST ABOUT 1MM DIAMETER, AND HEATED TO A MELTING TEMPERATURE UNDER A VACUUM OF AT LEAST 10-2MM HG IN AN INERT OF REDUCING ATMOSPHERE.
Claim 2
Independent Claim
173 words
A METHOD OF BRAZING CARBIDES, BORIDES, NITRIDES, SILICIDES AND CERAMICS TO EACH OTHER AND TO HIGH MELTING METALS COMPRISING BRAZING SAID MATERIALS IN THE PRESENCE OF A BAZING COMPOSITION CONSISTING ESSENTIALLY OF AN ALLOY CONSISTING ESSENTIALLY OF A MAJOR PROPORTION BY WEIGHT OF HAFNIUM, A FIRST ADDITIVE COMPONEN SELECTED FROM THE GROUP ONSISTING OF COPPER, GOLD, SILVER AND MIXTURES THEREOF, IN AN AMOUNT OF FROM 2 TO 30 PERCENT OF TH ALLOY WEIGHT, AND A SECOND ADDITIVE COMPONENT SELECTED FROM THE GROUP CONSISTING OF BORON, ALUMINUM, SCANDIUM, YYTTRIUM, LANTHANIDES, CARBON, SILICON, GERMANIUM, TITANIUM, ZIRCONIUM, VANADIUM, NIOBIUM, TANTALUM, PHOSPHOROUS, CROMIUM MOLYBDENUM, TUNGSTEN, MANGAESE, TECHNETIUM, RHENIUM, RUTHENIUM, OSMIUM, COBALT, NICKEL, RHODIUM, PALLADIUM, IRIDIUM, AND PLANTIUM, IN AN AMOUNT OF 2 TO 21 PERCENT OF THE ALLOY WEIGHT WHEREIN SAID ALLOY IS APPLIED AS PATICLES TO THE SURFACE OF THE MATERIALS TO BE BRAZED, SAID PARTICLES HAVING A PACTICLE SIZE OF AT LEAST ABOUT 1MM DIAMETER, AND HEATED TO A MELTING TEMPERATURE UNDER A VACUUM OF AT LEAST 10-2MM HG IN AN INERT OF REDUCING ATMOSPHERE.
Claim 3
Dependent Claim
35 words
A method of claim 1 wherein the first component is present in an amount of from 20 to 30% of the alloy weight and the melting point of said alloy is between 1000* to 1200*C.
Claim 4
Dependent Claim
35 words
A method of claim 1 wherein the first component is present in an amount of from 12 to 20% of the alloy weight and the melting point of said alloy is between 1200* to 1500*C.
Claim 5
Dependent Claim
35 words
A method of claim 1 wherein the first component is present in an amount of from 8 to 12% of the alloy weight and the melting point of said alloy is between 1500* to 1800*C.
Claim 6
Dependent Claim
35 words
A method of claim 1 wherein the first component is present in an amount of from 2 to 8% of the alloy weight and the melting point of said alloy is between 1800* to 2100*C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |