US2959494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum evaporated coating on ferrous metal
Assignee: Republic Steel Corp
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Filing: 1956-11-28
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Granted: 1960-11-08
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 George A Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:31
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; C23C14/021; C23G; C23G1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF PREPARING A FERROUS METAL SURFACE FOR VAPOR DEPOSITION OF AN ALUMINUM COATING WHICH COMPRISES TREATING THE SURFACE WITH AN ACID SOLUTION TO REMOVE IMPURITIES, PASSIVATING THE ACID CLEANED SURFACE WITH AN ALKALINE SOLUTION TO PRODUCE AN ELEMENTAL SURFACE, WIPING THE ELEMENTAL SURFACE AND SQUEEZING AND BLOWING THE SURFACE TO DRYNESS WITHOUT OXIDATION FOR THE DEPOSITION THEREON OF A COATING OF ALUMINUM FROM A VAPOR OF ALUMINUM IN A VACUUM.
Claim 2
Independent Claim
72 words
THE METHOD OF PREPARING A FERROUS METAL SURFACE FOR VAPOR DEPOSITION OF AN ALUMINUM COATING WHICH COMPRISES TREATING THE SURFACE WITH AN ACID SOLUTION TO REMOVE IMPURITIES, PASSIVATING THE ACID CLEANED SURFACE WITH AN ALKALINE SOLUTION TO PRODUCE AN ELEMENTAL SURFACE, WIPING THE ELEMENTAL SURFACE AND SQUEEZING AND BLOWING THE SURFACE TO DRYNESS WITHOUT OXIDATION FOR THE DEPOSITION THEREON OF A COATING OF ALUMINUM FROM A VAPOR OF ALUMINUM IN A VACUUM.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |