Patent US2678289A successfully refreshed from Google Patents.
US2678289A
Expired / Lapsed
US
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Metal surface treatment
Assignee: Freeport Minerals Co
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Filing: 1950-04-06
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Granted: 1954-05-11
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Expires: 1970-04-06
Abstract
No abstract record available.
Inventors
- 👤 Noble James Harvey
- 👤 Pottberg Rolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:22
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/28; C23G1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE TREATMENT OF SURFACE OXIDE FILMS ON A METAL ARTICLE FOR THE PURPOSE OF REMOVING SURFACE OXIDES THEREFROM COMPRISING SUBJECTING THE SURFACE OXIDES FREE OF ELECTRIC CIRCUIT CONNECTION TO THE ACTION OF A FUSED INORGANIC SALT OF THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METAL HYDROXIDES AND CARBONATES AND CONTAINING OXYGEN IN GASEOUS FORM, AND CONTINUING SAID TREATMENT TO THE MODIFICATION OF THE OXIDES TO A FORM EASILY REMOVABLE IN ACIDS WITHOUT DEPLETION OF THE TREATED METAL, AND THEN TREATING SAID SURFACE IN AN ACID BATH TO REMOVE REMAINING MODIFIED OXIDES.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE TREATMENT OF SURFACE OXIDE FILMS ON A METAL ARTICLE FOR THE PURPOSE OF REMOVING SURFACE OXIDES THEREFROM COMPRISING SUBJECTING THE SURFACE OXIDES FREE OF ELECTRIC CIRCUIT CONNECTION TO THE ACTION OF A FUSED INORGANIC SALT OF THE GROUP CONSISTING OF THE ALKALI AND ALKALINE EARTH METAL HYDROXIDES AND CARBONATES AND CONTAINING OXYGEN IN GASEOUS FORM, AND CONTINUING SAID TREATMENT TO THE MODIFICATION OF THE OXIDES TO A FORM EASILY REMOVABLE IN ACIDS WITHOUT DEPLETION OF THE TREATED METAL, AND THEN TREATING SAID SURFACE IN AN ACID BATH TO REMOVE REMAINING MODIFIED OXIDES.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |