US2490572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhodacyanine dyes and a method of preparing the same
Assignee: GAF Chemicals Corp
•
Filing: 1945-06-12
•
Granted: 1949-12-06
•
Expires: 1965-06-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Anish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:26
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1950421A
Cited
US2028141A
Cited
US2280253A
Cited
US2388963A
Cited
GB509927A
Cited
US2322015A
Cited
US2385747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |