US2885392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing high-purity, half-chromed azo dyes
Assignee: EIDP Inc
•
Filing: 1956-11-21
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Granted: 1959-05-05
•
Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Csendes Ernest
- 👤 Dobratz Irvin William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:10
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2673199A
Cited
US2674515A
Cited
US1693448A
Cited
US2711404A
Cited
US2767166A
Cited
US2756223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |