US2845365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum iron alloy
Assignee: Harris Transducer Corp
•
Filing: 1953-09-15
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Granted: 1958-07-29
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Expires: 1973-09-15
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/941; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
THE METHOD OF PRODUCING AN ELONGATED STRIP OF SUBSTANTIALLY HOMOGENEOUS ALLOY COMPOSED OF AN IRONRICH MATERIAL AND AN ALUMINUM-RICH MATERIAL, WHICH COMPRISES COATING A STRIP OF IRON-RICH MATERIAL WITH THE ALUMINUM RICH MATERIAL IN SUBSTANTIALLY THE DESIRED ALLOY PROPORTIONS, OXIDIZING THE EXPOSED ALUMINUM-RICH SURFACE, WHEREBY A PROTECTIVE REFRACTORY LAYER IS FORMED. ROLLING THE COATED STRIP INTO A HELICAL COMPACT, WHEREBY ALUMINUM-RICH COATINGS OF DIFFERENT PARTS OF SAID STRIP WILL BE IN IMMEDIATE ADJACENCY, SUBJECTING SAID COMPACT TO A NON-OXIDIZING ATMOSPHERE, AND IN SAID NONOXIDIZING ATMOSPHERE FIXING THE ALUMINUM IN THE IRON BY A RELATIVELY SLOW TRAVERSE OF THE MELTING POINT OF ALUMINUM AND THEREAFTER DIFFUSING THE ALUMINUM INTO THE IRON BY HOLDING SAID COMPACT IN SAID ATMOSPHERE AT AN ELEVATED TEMPERATURE IN THE RANGE 2000*F. TO 2400*F., AND CONTINUING SUCH DIFFUSION UNTIL SUBSTANTIALLY HOMOGENEOUSLY ALLOYED STRIP RESULTS.
Claim 2
Independent Claim
137 words
THE METHOD OF PRODUCING AN ELONGATED STRIP OF SUBSTANTIALLY HOMOGENEOUS ALLOY COMPOSED OF AN IRONRICH MATERIAL AND AN ALUMINUM-RICH MATERIAL, WHICH COMPRISES COATING A STRIP OF IRON-RICH MATERIAL WITH THE ALUMINUM RICH MATERIAL IN SUBSTANTIALLY THE DESIRED ALLOY PROPORTIONS, OXIDIZING THE EXPOSED ALUMINUM-RICH SURFACE, WHEREBY A PROTECTIVE REFRACTORY LAYER IS FORMED. ROLLING THE COATED STRIP INTO A HELICAL COMPACT, WHEREBY ALUMINUM-RICH COATINGS OF DIFFERENT PARTS OF SAID STRIP WILL BE IN IMMEDIATE ADJACENCY, SUBJECTING SAID COMPACT TO A NON-OXIDIZING ATMOSPHERE, AND IN SAID NONOXIDIZING ATMOSPHERE FIXING THE ALUMINUM IN THE IRON BY A RELATIVELY SLOW TRAVERSE OF THE MELTING POINT OF ALUMINUM AND THEREAFTER DIFFUSING THE ALUMINUM INTO THE IRON BY HOLDING SAID COMPACT IN SAID ATMOSPHERE AT AN ELEVATED TEMPERATURE IN THE RANGE 2000*F. TO 2400*F., AND CONTINUING SUCH DIFFUSION UNTIL SUBSTANTIALLY HOMOGENEOUSLY ALLOYED STRIP RESULTS.
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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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |