Patent US3531240A successfully refreshed from Google Patents.
US3531240A
Expired / Lapsed
US
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Process for the production of sodium bicarbonate and soda ash
Assignee: Davy McKee AG
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Filing: 1968-02-13
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Granted: 1970-09-29
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Expires: 1988-02-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert Furkert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:36
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/10; C01D7/07; C01D7/12; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/36; C25B1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3103413A
Cited
US2336045A
Cited
US2383674A
Cited
US2792283A
Cited
US2842489A
Cited
US3179579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |