US2885313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating magnesium-bearing aluminum base alloys with fluoroborate
Assignee: Alcoa Corp
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Filing: 1958-03-26
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Granted: 1959-05-05
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Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 Spencer R Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C22; C22F; C22F1/00; C22F1/04; C23F15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD OF TREATING FINISHING OR SEMI-FINISHED ARTICLES COMPOSED OF ALUMINUM BASE ALLOY CONTAINING FROM 0.1 TO 15 PERCENT MAGNESIUM COMPRISING THE STEPS OF COATING SAID ARTICLES WITH AN ORGANIC AMMONIUM FLUOROBORATE WHICH YIELDS BF3 WHEN HEATED TO A TEMPERATURE ABOVE 400*F, BUT BELOW 750*F., AND HEATING SAID COATED ARTICLE TO A TEMPERATURE BETWEEN 400 AND 750*F., BUT IN ALL CASE BELOW THE CRITICAL OXIDATION TEMPERATURE OF SAID ALLOY, FOR A PERIOD OF TIME SUFFICEINTLY LONG TO CAUSE SUBSTANTIAL DISAPPEARANCE OF THE ORGANIC SUBSTANCE.
Claim 2
Independent Claim
84 words
THE METHOD OF TREATING FINISHING OR SEMI-FINISHED ARTICLES COMPOSED OF ALUMINUM BASE ALLOY CONTAINING FROM 0.1 TO 15 PERCENT MAGNESIUM COMPRISING THE STEPS OF COATING SAID ARTICLES WITH AN ORGANIC AMMONIUM FLUOROBORATE WHICH YIELDS BF3 WHEN HEATED TO A TEMPERATURE ABOVE 400*F, BUT BELOW 750*F., AND HEATING SAID COATED ARTICLE TO A TEMPERATURE BETWEEN 400 AND 750*F., BUT IN ALL CASE BELOW THE CRITICAL OXIDATION TEMPERATURE OF SAID ALLOY, FOR A PERIOD OF TIME SUFFICEINTLY LONG TO CAUSE SUBSTANTIAL DISAPPEARANCE OF THE ORGANIC SUBSTANCE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |