Patent US2546642A successfully refreshed from Google Patents.
US2546642A
Expired / Lapsed
US
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Light-sensitive photographic emulsion
Assignee: Gevaert Photo Producten NV
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Filing: 1947-04-28
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Granted: 1951-03-27
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Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Koerber Willem Karel Antoon
- 👤 Desire Maria Aloysius Goethem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:22
CPC Classifications
F; F02; F02N; F02N3/00; F02N3/02; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AT LEAST ONE SENSITIZING DYESTUFF CORRESPONDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
US2075046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |