US3027233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alumina from aluminum sulfate
Assignee: Universal Oil Products Co
•
Filing: 1959-08-13
•
Granted: 1962-03-27
•
Expires: 1979-08-13
Abstract
No abstract record available.
Inventors
- 👤 Michalko Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:07
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1015499A
Cited
US1337192A
Cited
US1386920A
Cited
US2798050A
Cited
US2867588A
Cited
US2898306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |