US3676111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grain refining aluminum base alloys
Assignee: Olin Corp
•
Filing: 1971-03-01
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Granted: 1972-07-11
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Expires: 1991-03-01
Abstract
Abstract THE INSTANT DISCLOSURE TEACHES A METHOD OF GRAIN REFINING ALUMINUM BASE ALLOYS. THE METHOD OF THE PRESENT INVENTION COMPRISES ADDING BORON AND TITANIUM TO THE MELT IN SPECIFICALLY DEFINED QUANTITIES.
Inventors
- 👤 Peter F Wieser
- 👤 James E Dore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:23
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 0
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |