Patent US3390758A successfully refreshed from Google Patents.
US2067985A
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US
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Treatment of waste sulphuric acid and manufacture of sulphate and carbonaceous compositions therefrom
Assignee: Monsanto Chemicals Ltd
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Filing: 1933-05-10
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Granted: 1937-01-19
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Expires: 1953-05-10
Abstract
No abstract record available.
Inventors
- 👤 Neil A Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:04
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/92; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/324; C01B32/33
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) | 1940-01-19 | 1940-07-20 | 1941-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-19 | 1944-07-20 | 1945-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-19 | 1948-07-20 | 1949-01-19 | $7700.00 | Window Closed / Lapsed |