Patent US3549314A successfully refreshed from Google Patents.
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 13:05
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0057; Y; Y10; Y10S; Y10S423/00; Y10S423/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1333328A
Cited
US2726927A
Cited
US2593503A
Cited
US2570460A
Cited
US2758017A
Cited
US2771460A
Cited
US3113833A
Cited
US3178260A
Cited
US3362868A
Cited
US3425899A
Cited
US3404063A
Cited
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 |