Patent US2572097A successfully refreshed from Google Patents.
US2572097A
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US
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Separator
Assignee: Akzona Inc
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Filing: 1948-10-07
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Granted: 1951-10-23
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Expires: 1968-10-07
Abstract
No abstract record available.
Inventors
- 👤 Bakker Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:13
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/10; B01D24/12; B01D24/14; B01D24/46; B01D24/4626; B01F; B01F25/00; B01F25/40; B01F25/44; B01F25/441; B01F25/4412; B01F25/442; B01F25/4422; C; C02; C02F; C02F1/00; C02F1/006; C02F3/00; C02F3/02; C02F3/04; C02F3/043; Y; Y02; Y02W; Y02W10/00; Y02W10/10
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) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |