US2878189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of de-oxidizing metal surfaces
Assignee: Lanteris Space LLC
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Filing: 1954-12-16
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Granted: 1959-03-17
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Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Certa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:47
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/08; C23G1/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
THE METHOD OF REMOVING OXIDE FROM THE SURFACE OF AN OXIDIZED COBALT-NICKEL-IRON ALLOY ARTICLE WITHOUT ATTACK ON THE METAL ITSELF WHICH COMPRISES IMMERSING THE OXIDIZED ARTICLE IN A BATH, AT A TEMPERARURE ABOVE ABOUT 50*C., CONSISTING ESSENTIALLY OF AMMONIUM SUFLATE IN AQUEOUS SULFURIC ACID, AT LEAST UNTIL OXIDE HAS BEEN REMOVED FROM SAID SURFACE, THE CONCENTRATION OF SULFURIC ACID IN THE WATER BEING BETWEEN ABOUT 15 AND ABOUT 30% BY VOLUME, CALCULATED AS 66* BE''. H2SO4, AND SAID AMMONIUM SULFATE BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 75 GRAMS PER 100 ML. OF AQUEOUS SULFURIC ACID.
Claim 2
Independent Claim
98 words
THE METHOD OF REMOVING OXIDE FROM THE SURFACE OF AN OXIDIZED COBALT-NICKEL-IRON ALLOY ARTICLE WITHOUT ATTACK ON THE METAL ITSELF WHICH COMPRISES IMMERSING THE OXIDIZED ARTICLE IN A BATH, AT A TEMPERARURE ABOVE ABOUT 50*C., CONSISTING ESSENTIALLY OF AMMONIUM SUFLATE IN AQUEOUS SULFURIC ACID, AT LEAST UNTIL OXIDE HAS BEEN REMOVED FROM SAID SURFACE, THE CONCENTRATION OF SULFURIC ACID IN THE WATER BEING BETWEEN ABOUT 15 AND ABOUT 30% BY VOLUME, CALCULATED AS 66* BE''. H2SO4, AND SAID AMMONIUM SULFATE BEING PRESENT IN AN AMOUNT OF AT LEAST ABOUT 75 GRAMS PER 100 ML. OF AQUEOUS SULFURIC ACID.
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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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |