US3585195A
Expired / Lapsed
US
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Stabilization of aqueous solutions of certain acid substituted spectral sensitizing dyes
Assignee: Eastman Kodak Co
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Filing: 1969-05-23
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Granted: 1971-06-15
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Expires: 1989-05-23
Abstract
Abstract AQUEOUS SOLUTIONS OF ACID SUBSTITUTED PHOTOGRAPHIC SPECTRAL SENSITIZING DYES HAVING A PH OF ABOUT 6 TO 7.5 ARE PROVIDED, SAID SOLUTIONS EXHIBITING EXCELLENT STABILITY AGAINST LOSS OF DENSITY DURING STORAGE IN COMPARISON TO SIMILAR AQUEOUS DYE SOLUTIONS HAVING A HIGHER OR LOWER PH.
Inventors
- 👤 Donald W Heseltine
- 👤 Frank G Webster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09; C; C09; C09B; C09B23/00; C09B23/02; C09B23/04; C09B23/06; C09B23/08; C09B23/083; C09B23/10; C09B23/105; C09B23/107; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/127
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |