Patent US2839402A successfully refreshed from Google Patents.
US2839402A
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Sensitized silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1952-02-04
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Granted: 1958-06-17
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Edwards Harry Derek
- 👤 Doyle Frank Peter
- 👤 Palling Stanley John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/54; C07D263/56; C07C; C07C255/00; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/24; C07D277/00; C07D277/02; C07D277/08; C07D277/10; C07D277/60; C07D277/62; C07D277/64; C09; C09B; C09B23/00; C09B23/0091; C09B23/14; C09B23/145; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PHOTOGRAPHIC LIGHT-SENSITIVE GELATINO SILVER HALIDE EMULSION SENSITISED WITH A DYESTUFF SLECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
24 words
A PHOTOGRAPHIC LIGHT-SENSITIVE GELATINO SILVER HALIDE EMULSION SENSITISED WITH A DYESTUFF SLECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |