US2730441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reducing iron formate
Assignee: Republic Steel Corp
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Filing: 1953-02-02
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Granted: 1956-01-10
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Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 Henry L Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:54
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/20; B22F9/22; B22F9/24; B22F9/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE PROCESS OF MAKING FINELY DIVIDED IRON POWDER WITH A SUBSTANTIALLY REDUCED TENDENCY TOWARDS PYROPHORISM, COMPRISING THE STEPS OF INTRODUCING IRON FORMATE INTO A REACTION ZONE, INTRODUCING IN SAID REACTION ZONE IN CONTACT WITH SAID IRON FORMATE A REDUCING GAS, THE ESSENTIAL ACTIVE INGREDIENTS OF WHICH CONSIST OF HYDROGEN AND FROM ABOUT 0.1% BY VOLUME OF HYDROGEN CHLORIDE (BASED ON THE TOTAL VOLUME OF HYDROGEN PLUS HYDROGEN CHLORIDE) UP TO AN AMOUNT OF HYDROGEN CHLORIDE WHICH WILL CONVERT A SUBSTANTIAL AMOUNT OF THE IRON IN THE REACTION ZONE TO FERROUS CHLORIDE, MAINTAINING SAID IRON FORMATE AND SAID REDUCING GAS IN SAID ZONE IN A TEMPERATURE RANGE OF ABOUT 200* C. TO ABOUT 500* C., AND COOLING THE POWDERED IRON PRODUCED AS AFORSAID TO ROOM TEMPERATURE UNDER NON-OXIDIZING CONDITIONS BEFORE EXPOSURE THEREOF TO AIR.
Claim 2
Dependent Claim
133 words
THE PROCESS OF MAKING FINELY DIVIDED IRON POWDER WITH A SUBSTANTIALLY REDUCED TENDENCY TOWARDS PYROPHORISM, COMPRISING THE STEPS OF INTRODUCING IRON FORMATE INTO A REACTION ZONE, INTRODUCING IN SAID REACTION ZONE IN CONTACT WITH SAID IRON FORMATE A REDUCING GAS, THE ESSENTIAL ACTIVE INGREDIENTS OF WHICH CONSIST OF HYDROGEN AND FROM ABOUT 0.1% BY VOLUME OF HYDROGEN CHLORIDE (BASED ON THE TOTAL VOLUME OF HYDROGEN PLUS HYDROGEN CHLORIDE) UP TO AN AMOUNT OF HYDROGEN CHLORIDE WHICH WILL CONVERT A SUBSTANTIAL AMOUNT OF THE IRON IN THE REACTION ZONE TO FERROUS CHLORIDE, MAINTAINING SAID IRON FORMATE AND SAID REDUCING GAS IN SAID ZONE IN A TEMPERATURE RANGE OF ABOUT 200* C. TO ABOUT 500* C., AND COOLING THE POWDERED IRON PRODUCED AS AFORSAID TO ROOM TEMPERATURE UNDER NON-OXIDIZING CONDITIONS BEFORE EXPOSURE THEREOF TO AIR.
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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |