Patent US3090702A successfully refreshed from Google Patents.
US3090702A
Expired / Lapsed
US
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Protective coating of refractory metals
Assignee: Chromizing Corp
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Filing: 1961-01-23
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Granted: 1963-05-21
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Maurice R Commanday
- 👤 Peter J Plambeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
C; C23; C23C; C23C12/00; C23C12/02; F; F02; F02B; F02B77/00; F02B77/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS OF PROTETIVELY COATING A REFRACTORY BASE METAL OF THE GROUP CONSISTING OF MOLYBDENUM, TANTALUM, TANGSTEN AND COLUMBIUM, AND ALLIYS OF THOSE RESPECTIVE METALS, THAT INCLUDES HEATING THE BASE METAL AT A TEMPERATURE BETWEEN ABOUT 1600* F. AND 2200* F. IN A NON-OXIDIZING ATMOSPHERE AND IN CONTACT WITH A POWDERED MIXTURE OF AN INERT SOLID DILUENT, A HALOGEN SOURCE AND BOTH BORON AND SILICON DISTRIBUTED IN SAID MIXTURE IN CONDITION FROM WHICH THE BORON AND SILICON ARE DIFFUSIBLE INTO THE BASE METAL, AND THEREBY DIFFUSING SILICON AND BORON INTO THE SURFACE OF THE BASE METAL TO FORM A CONTINUOUS PROTECTIVE COATING INTEGRATED THEREWITH.
Claim 2
Dependent Claim
104 words
THE PROCESS OF PROTETIVELY COATING A REFRACTORY BASE METAL OF THE GROUP CONSISTING OF MOLYBDENUM, TANTALUM, TANGSTEN AND COLUMBIUM, AND ALLIYS OF THOSE RESPECTIVE METALS, THAT INCLUDES HEATING THE BASE METAL AT A TEMPERATURE BETWEEN ABOUT 1600* F. AND 2200* F. IN A NON-OXIDIZING ATMOSPHERE AND IN CONTACT WITH A POWDERED MIXTURE OF AN INERT SOLID DILUENT, A HALOGEN SOURCE AND BOTH BORON AND SILICON DISTRIBUTED IN SAID MIXTURE IN CONDITION FROM WHICH THE BORON AND SILICON ARE DIFFUSIBLE INTO THE BASE METAL, AND THEREBY DIFFUSING SILICON AND BORON INTO THE SURFACE OF THE BASE METAL TO FORM A CONTINUOUS PROTECTIVE COATING INTEGRATED THEREWITH.
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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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |