US2721798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds containing an isophthalate group useful in photography
Assignee: Eastman Kodak Co
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Filing: 1953-09-02
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Granted: 1955-10-25
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Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 Loria Anthony
- 👤 Edward T Pesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/006; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTANING A COMPOUND SELECTED FROM THOSE HAVING THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
16 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTANING A COMPOUND SELECTED FROM THOSE HAVING THE FOLLOWING GENERAL 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) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |