Patent US3039873A successfully refreshed from Google Patents.
US3039873A
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Sulfonic acid esters and quaternary salts of polyhydroxy compounds containing 3 or more ethylene oxide chains as novel photographic sensitizers
Assignee: Eastman Kodak Co
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Filing: 1959-11-16
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Granted: 1962-06-19
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Expires: 1979-11-16
Abstract
No abstract record available.
Inventors
- 👤 Dorothy J Beavers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH (1) A GOLD COMPOUND, (2) A COMPOUND CONTAINING A LABILE SULFUR ATOM, AND (3) A CONDENSATION PRODUCT OF ALKYLENE OXIDES AND PRODUCTS CONTAINING THE PYRANOSE RING SYSTEM SELECTED FROM THE CLASS CONSISTING OF THE SULFONIC ACID ESTERS, PYRIDINIUM SALTS, AND QUATERNARY AMONIUM SALTS OF THE SAID CONDENSATION PRODUCTS OF ALKYLENE OXIDES AND PRODUCTS CONTAINING THE PYRANOSE RING SYSTEM.
References Cited (Backward Citations)
US2400532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |