Patent JPS5349630U successfully refreshed from Google Patents.
US2592364A
Expired / Lapsed
US
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p-phenylenediamine developer containing alkylacylamidoethyl or alkylacylamidoethoxyring substituents
Assignee: Eastman Kodak Co
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Filing: 1948-03-06
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Granted: 1952-04-08
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Expires: 1968-03-06
Abstract
No abstract record available.
Inventors
- 👤 Weissberger Arnold
- 👤 Dudley B Glass
- 👤 Paul W Vittum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:07
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PHOTOGRAPHIC SILVER HALIDE DEVELOPING SOLUTION COMPRISING AS THE DEVELOPING AGENT A COMPOUND OF THE GROUP CONSISTING OF
Claim 2
Dependent Claim
18 words
A PHOTOGRAPHIC SILVER HALIDE DEVELOPING SOLUTION COMPRISING AS THE DEVELOPING AGENT A COMPOUND OF THE GROUP CONSISTING OF
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |