US3523568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentrating liquid solutions as films on gas swept rotating hollow porous members
Assignee: Lever Brothers Co
•
Filing: 1968-03-12
•
Granted: 1970-08-11
•
Expires: 1988-03-12
Abstract
No abstract record available.
Inventors
- 👤 Berardus Van Leeuwen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:59
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; A; A23; A23F; A23F3/00; A23F3/16; A23F3/22; A23F3/225; A23F5/00; A23F5/24; A23F5/28; A23L; A23L2/00; A23L2/02; A23L2/08; A23L2/082; A23L27/00; B01D3/00; B01D3/08; B01D2311/00; B01D2311/26; B01D2311/2611; B01D2315/00; B01D2315/02; Y; Y10; Y10S; Y10S159/00; Y10S159/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |