US2885315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating magnesium-bearing aluminum base alloys with boron trifluoride
Assignee: Alcoa Corp
•
Filing: 1958-03-26
•
Granted: 1959-05-05
•
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
2026-10-29 05:13
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C22; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF TREATING FINISHED OR SEMI-FINISHED ARTICLES COMPOSED OF AN ALUMINUM BASE ALLOY CONTAINING FROM 0.1 TO 1K PERCENT MAGNESIUM COMPRISING EXPOSING SAID ARTICLES TO AN ATMOSPHERE CONTAINING AT LEAST 75 MILIGRAMS OF BORONN TRIFLUORIDE VAPOAR PER CUBIC FOOT OF FURNACE ATMOSPHERE FOR A PERIOD FROM ONE TO FORTY-FIVE MINUTES AT A TEMPERATURE BETWEEN 400*F.AND 750*F., BUAT BELOW THE CRITICAL OXIDATION TEMPERATURE OF SAID ALLOY.
Claim 2
Independent Claim
66 words
THE METHOD OF TREATING FINISHED OR SEMI-FINISHED ARTICLES COMPOSED OF AN ALUMINUM BASE ALLOY CONTAINING FROM 0.1 TO 1K PERCENT MAGNESIUM COMPRISING EXPOSING SAID ARTICLES TO AN ATMOSPHERE CONTAINING AT LEAST 75 MILIGRAMS OF BORONN TRIFLUORIDE VAPOAR PER CUBIC FOOT OF FURNACE ATMOSPHERE FOR A PERIOD FROM ONE TO FORTY-FIVE MINUTES AT A TEMPERATURE BETWEEN 400*F.AND 750*F., BUAT BELOW THE CRITICAL OXIDATION TEMPERATURE OF SAID ALLOY.
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 |