US3549314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of black liquor
Assignee: Chemical Construction Corp
•
Filing: 1968-05-20
•
Granted: 1970-12-22
•
Expires: 1988-05-20
Abstract
No abstract record available.
Inventors
- 👤 Indravadan S Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:51
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0057; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1333328A
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US2726927A
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US2570460A
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US2758017A
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US3362868A
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US3425899A
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US3404063A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |