US2839423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating alkaline earth metal with protective metal
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1955-06-03
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Granted: 1958-06-17
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Expires: 1975-06-03
Abstract
No abstract record available.
Inventors
- 👤 Howard J Homer
- 👤 John R Whitacre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:04
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/20; B; B22; B22F; B22F1/00; B22F1/17; C23; C23C; C23C16/00; C23C16/44; C23C16/442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN A PROCESS OF PROVIDING A PROTECTIVE METAL COATING ON PARTICLES OF ALKALINE-EARTH METAL IN POWDER FORM, THE STEPS OF SUSPENDING PARTICLES OF THE METAL IN A FLOWING STREAM OF A GAS WHICH IS INERT TO THE METAL PARTICLES, PASSING THE FLOWING STREAM OF INERT GAS AND PARTICLES INTO A HEATING ZONE TO HEAT THE PARTICLES WHILE THEY ARE SUSPENDED, PROVIDING A SOURCE OF A METAL BEARING GAS WHICH IS HEAT DECOMPOSABLE TO DEPOSIT A METAL WHICH RESISTS THE CORROSIVE INFLUENCE OF THE AIR, HEATING THE PARTICLES WHILE SUSPENDED IN THE HEATING ZONE TO A TEMPERATURE AT WHICH SAID METAL BEARING GAS DECOMPOSES, PASSING A STREAM OF THE METAL BEARING GAS INTO CONTACT WITH THE HEATED PARTICLES IN SAID ZONE WHEREBY SAID METAL BEARING GAS DECOMPOSES TO DEPOSIT METAL ON THE PARTICLES, EXHAUSTING THE COATED PARTICLES FROM THE SAID ZONE WITH THE SUSPENDING GAS, AND THEREAFTER SEPARATING THE PARTICLES FROM THE GAS.
Claim 2
Dependent Claim
152 words
IN A PROCESS OF PROVIDING A PROTECTIVE METAL COATING ON PARTICLES OF ALKALINE-EARTH METAL IN POWDER FORM, THE STEPS OF SUSPENDING PARTICLES OF THE METAL IN A FLOWING STREAM OF A GAS WHICH IS INERT TO THE METAL PARTICLES, PASSING THE FLOWING STREAM OF INERT GAS AND PARTICLES INTO A HEATING ZONE TO HEAT THE PARTICLES WHILE THEY ARE SUSPENDED, PROVIDING A SOURCE OF A METAL BEARING GAS WHICH IS HEAT DECOMPOSABLE TO DEPOSIT A METAL WHICH RESISTS THE CORROSIVE INFLUENCE OF THE AIR, HEATING THE PARTICLES WHILE SUSPENDED IN THE HEATING ZONE TO A TEMPERATURE AT WHICH SAID METAL BEARING GAS DECOMPOSES, PASSING A STREAM OF THE METAL BEARING GAS INTO CONTACT WITH THE HEATED PARTICLES IN SAID ZONE WHEREBY SAID METAL BEARING GAS DECOMPOSES TO DEPOSIT METAL ON THE PARTICLES, EXHAUSTING THE COATED PARTICLES FROM THE SAID ZONE WITH THE SUSPENDING GAS, AND THEREAFTER SEPARATING THE PARTICLES FROM THE GAS.
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) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |