US3367771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of magnesium ferrosilicon alloys
Assignee: Dow Chemical Co
•
Filing: 1965-02-23
•
Granted: 1968-02-06
•
Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 John C Robertson
- 👤 Tress William R Von
- 👤 James H Enos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:55
CPC Classifications
C; C22; C22C; C22C28/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US938758A
Cited
US1376113A
Cited
US1927819A
Cited
US2656269A
Cited
US2762705A
Cited
US3094412A
Cited
US3138450A
Cited
US3177071A
Cited
US3113019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |