US2416547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct azo dyes containing 3,5 dihydroxy benzoylamino groups
Assignee: EIDP Inc
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Filing: 1944-07-06
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Granted: 1947-02-25
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Expires: 1964-07-06
Abstract
No abstract record available.
Inventors
- 👤 Swanie S Rossander
- 👤 Chiles E Sparks
- 👤 Jr James W Libby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/124; C09B43/132
Claims Analysis
Total Claims: 0
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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) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |