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Patent US2447462A successfully refreshed from Google Patents.
US2447462A
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A dye composition for color photography
Assignee: GAF Chemicals Corp
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Filing: 1944-08-31
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Granted: 1948-08-17
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Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 Harold C Harsh
- 👤 Richard M Haff
- 👤 Frank J Kassuba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
G; G03; G03C; G03C11/00; G03C11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US923019A
Cited
US1661079A
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GB264879A
Cited
US1756951A
Cited
US1974524A
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US2036546A
Cited
GB442522A
Cited
US2030740A
Cited
US2145954A
Cited
US2248048A
Cited
US2235165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |