Patent US3853582A successfully refreshed from Google Patents.
US3853582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized isotropic boron nitride body and method for making same
Assignee: Raytheon Co
•
Filing: 1972-01-13
•
Granted: 1974-12-10
•
Expires: 1992-01-13
Abstract
Abstract An isotropic boron nitride body is metallized with an alloy or intimate mixture formed from an active metal dissolved in a solder metal, which solder metal possesses a substantially lower melting point than the active metal hydride. The molybdenum is selectively added for increasing craze resistance.
Inventors
- 👤 W Labossier
- 👤 H Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:53
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/80; C04B41/81; C04B41/85; C04B41/88
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A METHOD FOR METALLIZING THE SURFACE OF AN ISOTROPIC BORON NITRIDE BODY COMPRISING THE STEPS OF: REMOVING THE SURFACE CONTAMINANTS FROM THE BORON NITRIDE BODY BY VAPORIZING SAID CONTAMINANTS; COATING A SURFACE OF THE CLEAN BORON NITRIDE BODY WITH A COMPOSITION COMPRISING POWDERS SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF ZIROCONIUM HYDRIDE, TITANIUM HYDRIDE, AND HAFNIUM HYDRIDE; FIVE TO TWELVE PERCENT BY WEIGHT OF MOLYBDENUM POWDER; AND THE POWDERS SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF NICKEL, PLATINUM, COPPER, GOLD, AND SILVER, AND HEATING SAID BODY IN A NON-REACTIVE ATMOSPHERE WITHIN A TEMPERATURE RANGE FROM ABOUT 1000*C TO ABOUT 1500*C.
Claim 2
Independent Claim
106 words
A METHOD FOR METALLIZING THE SURFACE OF AN ISOTROPIC BORON NITRIDE BODY COMPRISING THE STEPS OF: REMOVING THE SURFACE CONTAMINANTS FROM THE BORON NITRIDE BODY BY VAPORIZING SAID CONTAMINANTS; COATING A SURFACE OF THE CLEAN BORON NITRIDE BODY WITH A COMPOSITION COMPRISING POWDERS SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF ZIROCONIUM HYDRIDE, TITANIUM HYDRIDE, AND HAFNIUM HYDRIDE; FIVE TO TWELVE PERCENT BY WEIGHT OF MOLYBDENUM POWDER; AND THE POWDERS SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF NICKEL, PLATINUM, COPPER, GOLD, AND SILVER, AND HEATING SAID BODY IN A NON-REACTIVE ATMOSPHERE WITHIN A TEMPERATURE RANGE FROM ABOUT 1000*C TO ABOUT 1500*C.
Claim 3
Dependent Claim
34 words
The method according to claim 1 wherein the step of coating a surface of the clean boron nitride body with a composition includes in said composition one to seventeen percent by weight of nickel.
Claim 4
Dependent Claim
29 words
The method according to claim 1 wherein the step of coating a surface of the clean boron nitride body with a composition includes in said composition nickel and zirconium.
References Cited (Backward Citations)
CA652948A
Cited
US2351798A
Cited
US2570248A
Cited
US2857663A
Cited
US3181947A
Cited
US3446643A
Cited
US3399076A
Cited
US3410714A
Cited
US3502493A
Cited
US3515574A
Cited
US3620799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |