Patent US2552240A successfully refreshed from Google Patents.
US2552240A
Expired / Lapsed
US
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N-beta-methylsulfonamidoethyl-p-phenylenediamines
Assignee: Eastman Kodak Co
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Filing: 1949-03-14
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Granted: 1951-05-08
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Expires: 1969-03-14
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
2026-11-03 14:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/46; A61K8/466; A61Q; A61Q5/00; A61Q5/10; G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413; G03C7/4136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN AMINO COMPOUND OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
AN AMINO COMPOUND OF 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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |