US3118762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion process for the manufacture of a malleable iron-chromium alloy
Assignee: Individual
•
Filing: 1960-07-25
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Granted: 1964-01-21
•
Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Weatherley Eric George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:03
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/36; C23C10/38; C23C10/40; C23C10/42; C22; C22C; C22C1/00; C22C1/02; Y; Y10; Y10S; Y10S148/00; Y10S148/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A PROCESS FOR THE MANUFACTURE OF A MALLEABLE IRONCHROMIUM ALLOY, WHICH COMPRISES PACKING A SHEET OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF MILD STEEL AND WROUGHT IRON IN A MIXTURE OF FINELY DIVIDED CHROMIUM AND A SAND WHICH CONTAINS NOT LESS THAN 99.3% SILICON DIOXIDE AND NOT MORE THAN 0.05% IRON ESTIMATED AS FERRIC OXIDE, THE THICKNESS OF THE SHEET BEING NOT MORE THAN ABOUT 0.008 INCH AND THE CONTENT OF CONSTITUENTS OTHER THAN IRON IN THE SAND MATERIAL BEING SUCH AS NOT SUBSTANTIALLY TO HINDER THE DIFFUSION OF CHROMIUM INTO THE SHEET AT A TEMPERATURE OF NOT LESS THAN 1020*C., HEATING THE SHEET AND MIXTURE OF CHROMIUM AND SAND TO A TEMPERA-
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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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |