Patent US2801254A successfully refreshed from Google Patents.
US2801254A
Expired / Lapsed
US
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1-phenyl-3, 5-pyrazolidinediones as antioxidants for fats and oils
Assignee: Eastman Kodak Co
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Filing: 1955-07-25
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Granted: 1957-07-30
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Lappin
- 👤 Clarence E Tholstrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:54
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0042; C11B5/0064; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/28; C07D231/30; C07D231/32; C07D231/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A FATTY MATERIAL NORMALLY SUBJECT TO OXIDATION STABILIZED WITH A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
16 words
A FATTY MATERIAL NORMALLY SUBJECT TO OXIDATION STABILIZED WITH A COMPOUND HAVING THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2427911A
Cited
US2458780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |