Patent US2512287A successfully refreshed from Google Patents.
US3211562A
Expired / Lapsed
US
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Oxalic acid-bis-hydroxyarylamides as ultraviolet stabilizers for organic plastic compositions
Assignee: BASF Schweiz AG
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Filing: 1962-07-05
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Granted: 1965-10-12
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Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Biland Hans Rudolf
- 👤 Duenneuberger Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0042; C11B5/005; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/42; A61Q; A61Q17/00; A61Q17/04; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C09K15/22; C11B5/0057; C11D; C11D9/00; C11D9/04; C11D9/045; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/418; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
AN ACETYL CELLULOSE COMPOSITION CONTAINING FROM 0.01% TO 10% BY WEIGHT OF AN OXALIC ACID-BIS-HYDROXYARYLAMIDE OF THE FORMULA
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |