US3061437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfone bis-quaternary salts as sensitizers for photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1959-10-26
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Granted: 1962-10-30
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Donald M Burness
- 👤 Kenneth C Kennard
- 👤 Bernard C Cossar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/16; C07D213/20; C07D213/24; C07D213/28; C07D213/32; C07D213/34; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
A PHOTOGRAPHIC SILVER HALIDE DEVELOPING-OUT EMULSION SENSITIZED WITH A GOLD SALT AND A LABILE SULFUR COMPOUND AND CONTAINING A SENSITIZING AMOUNT OF A COMPOUND SELECTED FROM THE CLASS REPRESENTED BY THE FOLLOWING 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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |