US3011867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitation of manganese carbonate
Assignee: Manganese Chemicals Corp
•
Filing: 1956-07-09
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Granted: 1961-12-05
•
Expires: 1976-07-09
Abstract
No abstract record available.
Inventors
- 👤 Jay Y Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1854664A
Cited
US2346140A
Cited
US2684891A
Cited
US2608463A
Cited
US2625462A
Cited
US2762703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |