US1592480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alkali-earth metal permanganates
Assignee: SECRETARY OF WAR OF UNITED
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Filing: 1922-07-17
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Granted: 1926-07-13
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Expires: 1942-07-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Wilson
- 👤 Leon W Parsons
- 👤 Stanley L Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:12
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/12; C01G45/1207
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) | 1929-07-12 | 1930-01-11 | 1930-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-07-12 | 1934-01-11 | 1934-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-07-12 | 1938-01-11 | 1938-07-13 | $7700.00 | Window Closed / Lapsed |