US2625495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature cleaning of ferrous metal
Assignee: Surface Combustion Corp
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Filing: 1948-06-04
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Granted: 1953-01-13
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Expires: 1968-06-04
Abstract
No abstract record available.
Inventors
- 👤 Cone Carroll
- 👤 Huebler Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
C; C23; C23G; C23G5/00; C21; C21D; C21D3/00; C21D3/02; C21D3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF CLEANING FERROUS METAL WHOSE SURFACE CARRIES CARBONACEOUS MATTER AND IRON OXIDES THAT COMPRISES THE STEP OF EXPOSING SAID METAL AT A TEMPERATURE OF 670* F.-1700* F. TO AN ATMOSPHERE THAT CONTAINS BOTH (1) A GAS THAT IS OXIDIZING TO CARBON AND (2) A SECOND GAS THAT IS DEOXIDIZING TO IRON OXIDES, AND SO ADJUSTING THE LENGTH OF TIME OF SUCH EXPOSURE AND THE CONCEN-
Claim 2
Independent Claim
67 words
A METHOD OF CLEANING FERROUS METAL WHOSE SURFACE CARRIES CARBONACEOUS MATTER AND IRON OXIDES THAT COMPRISES THE STEP OF EXPOSING SAID METAL AT A TEMPERATURE OF 670* F.-1700* F. TO AN ATMOSPHERE THAT CONTAINS BOTH (1) A GAS THAT IS OXIDIZING TO CARBON AND (2) A SECOND GAS THAT IS DEOXIDIZING TO IRON OXIDES, AND SO ADJUSTING THE LENGTH OF TIME OF SUCH EXPOSURE AND THE CONCEN-
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) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |