Patent US2221559A successfully refreshed from Google Patents.
US2221559A
Expired / Lapsed
US
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Process for bleaching oils, fats and waxes
Assignee: Evonik Operations GmbH
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Filing: 1937-10-20
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Granted: 1940-11-12
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Expires: 1957-10-20
Abstract
No abstract record available.
Inventors
- 👤 Scheller Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:49
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H01F41/125; C; C10; C10G; C10G73/00; C10G73/42; C11; C11B; C11B11/00; C11B11/005; C11B3/00; C11B3/02; C11B3/08
Claims Analysis
Total Claims: 0
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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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |