US3540192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the de-aeration of solutions,preferentially solutions of viscose
Assignee: Valmet AB
•
Filing: 1968-08-05
•
Granted: 1970-11-17
•
Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Olof Birger Nvstrom
- 👤 Bengt Henrik Strid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |