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US2981592A
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Method and apparatus for calcining salt solutions
Assignee: Individual
•
Filing: 1957-05-13
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Granted: 1961-04-25
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Lawroski Stephen
- 👤 Albert A Jonke
- 👤 Rollin G Taecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:23
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/01; C01P; C01P2004/00; C01P2004/51; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1920632A
Cited
US2025402A
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US2155119A
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US2678257A
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US2790701A
Cited
US2642339A
Cited
US2714550A
Cited
US2777755A
Cited
US2757072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |