US2145398A
Expired / Lapsed
US
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Yellow azo pigment composition
Assignee: EIDP Inc
•
Filing: 1937-08-05
•
Granted: 1939-01-31
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Expires: 1957-08-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:59
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0051; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-30 | 1942-08-01 | 1943-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-30 | 1946-08-01 | 1947-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-30 | 1950-08-01 | 1951-01-31 | $7700.00 | Window Closed / Lapsed |