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Patent US3549484A successfully refreshed from Google Patents.
US3549484A
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US
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Method and apparatus for the recovery of sulfite waste liquors
Assignee: Prvni Brnenska Strojirna Zavody Klementa Gottwalda
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Filing: 1967-08-28
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Granted: 1970-12-22
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Expires: 1987-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jan Hojnos
- 👤 Ivan Grancic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:34
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/12; D21C11/122; B; B01; B01F; B01F25/00; B01F25/20; B01F25/70; B01F25/72; B01F25/721
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |