US2676900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for removal of oxides from the surface of metals
Assignee: Occidental Chemical Corp
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Filing: 1947-07-08
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Granted: 1954-04-27
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Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 Harry R Spence
- 👤 Arnold N Johnson
- 👤 Sidney G Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:54
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE REMOVAL OF DENSE FIRMLY ADHERENT OXIDE FORM THE SURFACE OF METALS INCLUDING THE STEP OF SUBJECTING THE OXIDE TO THE ACTION OF A FUSED SUBSTANTIALLY ANHYDROUS BATH OF CAUSTIC ALKALI CONTAINING AND OXIDIZING AGENT STABLE THEREWITH UNDER THE CONDITIONS OF THE PROCESS AND SUSCEPTIBLE OF REGENERATION BY OXIDATION FROM A LOWER TO A HIGHER STATE OF OXIDATION, AND A MINOR PROPORTION, BASED ON THE OXIDIZING AGENT, OF A MATERIAL SUSCEPTIBLE OF OXIDATION TO A STATE OF OXIDATION IN WHICH IT IS CAPABLE TO GIVING UP OXYGEN TO THE REDUCED OXIDIZING AGENT, THE METHOD OF ACCELERATING THE REGENERATION OF THE OXIDIZING AGENT, WHICH COMPRISES BUBBLING OXYGEN THROUGH THE BATH.
Claim 2
Dependent Claim
110 words
IN THE REMOVAL OF DENSE FIRMLY ADHERENT OXIDE FORM THE SURFACE OF METALS INCLUDING THE STEP OF SUBJECTING THE OXIDE TO THE ACTION OF A FUSED SUBSTANTIALLY ANHYDROUS BATH OF CAUSTIC ALKALI CONTAINING AND OXIDIZING AGENT STABLE THEREWITH UNDER THE CONDITIONS OF THE PROCESS AND SUSCEPTIBLE OF REGENERATION BY OXIDATION FROM A LOWER TO A HIGHER STATE OF OXIDATION, AND A MINOR PROPORTION, BASED ON THE OXIDIZING AGENT, OF A MATERIAL SUSCEPTIBLE OF OXIDATION TO A STATE OF OXIDATION IN WHICH IT IS CAPABLE TO GIVING UP OXYGEN TO THE REDUCED OXIDIZING AGENT, THE METHOD OF ACCELERATING THE REGENERATION OF THE OXIDIZING AGENT, WHICH COMPRISES BUBBLING OXYGEN THROUGH THE BATH.
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) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |