US3096174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of reducing a metal oxide by a carbonaceous material at sub-atmospheric pressures
Assignee: ESAB AB
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Filing: 1958-04-10
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Granted: 1963-07-02
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Expires: 1978-04-10
Abstract
No abstract record available.
Inventors
- 👤 Helin Elis Erik Vilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE METHOD OF REDUCING A METAL OXIDE BY A CARBONACEOUS MATERIAL BY THE HEATING OF A COMMINUTED SOLID MIXTURE OF SAID MATERIALS AT SUB-ATMOSPHERIC PRESSURES, THE STEPS OF CHARGING SAID UNREACTED MIXTURE INTO A SHEET; METAL CONTAINER THE WALL THICKNESS OF WHICH IS INSUFFICIENT TO ENABLE THE CONTAINER TO RETAIN ITS SHAPE AGAINST EXTERNAL ATMOSPHERIC PRESSURE ON EXHAUSTION AT ELEVATED TEMPERATURES, AND HEATING SAID CHARGED CONTAINER AT ATMOSPHERIC PRESSURE WHILE MAINTING A SUB-ATMOSPHERIC PRESSURE IN THE INTERIOR OF SAID CONTAINER.
Claim 2
Dependent Claim
81 words
IN THE METHOD OF REDUCING A METAL OXIDE BY A CARBONACEOUS MATERIAL BY THE HEATING OF A COMMINUTED SOLID MIXTURE OF SAID MATERIALS AT SUB-ATMOSPHERIC PRESSURES, THE STEPS OF CHARGING SAID UNREACTED MIXTURE INTO A SHEET; METAL CONTAINER THE WALL THICKNESS OF WHICH IS INSUFFICIENT TO ENABLE THE CONTAINER TO RETAIN ITS SHAPE AGAINST EXTERNAL ATMOSPHERIC PRESSURE ON EXHAUSTION AT ELEVATED TEMPERATURES, AND HEATING SAID CHARGED CONTAINER AT ATMOSPHERIC PRESSURE WHILE MAINTING A SUB-ATMOSPHERIC PRESSURE IN THE INTERIOR OF SAID CONTAINER.
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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |