Patent US3425833A successfully refreshed from Google Patents.
US3425833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mordants for bleachable filter layers
Assignee: Eastman Kodak Co
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Filing: 1965-08-16
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Granted: 1969-02-04
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert C Taber
- 👤 Dugald A Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07D213/06; C07D213/16; C07D213/20; C07D215/00; C07D215/02; C07D215/04; C07D215/10; C07D235/00; C07D235/02; C07D235/04; C07D235/06; C07D257/00; C07D257/02; C07D257/04; C07D277/00; C07D277/02; C07D277/20; C07D277/22; C07D277/60; C07D277/62; C07D277/64; C07D277/84; C07D293/00; C07D293/02; C07D293/04; C07D293/06; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C8/00; G03C8/42; G03C8/52; G03C8/56; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT MATERIAL HAVING THEREON A HYDROPHILIC COLLOID LAYER CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
25 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT MATERIAL HAVING THEREON A HYDROPHILIC COLLOID LAYER CONTAINING AT LEAST ONE COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US3016306A
Cited
US3271148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |