Patent US2357825A successfully refreshed from Google Patents.
US2568894A
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US
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4-benzoylresorcinol as an ultraviolet absorbent
Assignee: GAF Chemicals Corp
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Filing: 1949-09-15
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Granted: 1951-09-25
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Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Mackey E Scudder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; Y; Y10; Y10S; Y10S56/00; Y10S56/01
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |