Patent US2618656A successfully refreshed from Google Patents.
US2618656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(alkylsulfonamidoalkyl) arylhydrazines
Assignee: Eastman Kodak Co
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Filing: 1950-04-29
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Granted: 1952-11-18
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Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 John R Thirtle
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; B; B01; B01F; B01F27/00; B01F27/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRAZINES REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDRAZINES REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US2550661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |