Patent US3043679A successfully refreshed from Google Patents.
US3043679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing chromium
Assignee: Diamond Shamrock Corp
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Filing: 1958-10-20
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Granted: 1962-07-10
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Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Ivor E Campbell
- 👤 Joseph H Oxley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:36
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE METHOD OF CONTINUOUSLY PRODUCING HIGH-PURITY CHROMIN METAL WHICH COMPRISES ENTRAINING FINELY DIVIDED SOLID CHROMIC CHLORIDE HAVING A PARTICLE SIZE OF LESS THAN 60 MESH IN HYDROGEN GAS, INTRODUCING THE HYDROGEN GAS AND ENTRAINED CHROMIC CHLORIDE INTO A REACTOR CONTAINING A BED OF FINELY-DIVIDED HIGH-PURITY CHROMIUM METAL HAVING A PARTICLE SIZE WITHIN THE RANGE OF 20 TO 100 MESH, THE HYDROGEN GAS AND ENTRAINED CHROMIC CHLORIDE BEING INTRODUCED AT A VELOCITY SUFFICIENT TO FLUIDIZE THE BED OF CHROMIUM METAL, MAINTAINING THE FLUIDIZED BED AT A TEMPERATURE IN THE RANGE OF ABOUT 800* TO 950*C. SUCH
Claim 2
Independent Claim
95 words
THE METHOD OF CONTINUOUSLY PRODUCING HIGH-PURITY CHROMIN METAL WHICH COMPRISES ENTRAINING FINELY DIVIDED SOLID CHROMIC CHLORIDE HAVING A PARTICLE SIZE OF LESS THAN 60 MESH IN HYDROGEN GAS, INTRODUCING THE HYDROGEN GAS AND ENTRAINED CHROMIC CHLORIDE INTO A REACTOR CONTAINING A BED OF FINELY-DIVIDED HIGH-PURITY CHROMIUM METAL HAVING A PARTICLE SIZE WITHIN THE RANGE OF 20 TO 100 MESH, THE HYDROGEN GAS AND ENTRAINED CHROMIC CHLORIDE BEING INTRODUCED AT A VELOCITY SUFFICIENT TO FLUIDIZE THE BED OF CHROMIUM METAL, MAINTAINING THE FLUIDIZED BED AT A TEMPERATURE IN THE RANGE OF ABOUT 800* TO 950*C. SUCH
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |