US2496899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azamerocyanine dyes and a process for the preparation thereof
Assignee: GAF Chemicals Corp
•
Filing: 1946-07-16
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Granted: 1950-02-07
•
Expires: 1966-07-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:25
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; C09B23/162; C09B23/164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AN AZAMEROCYANINE DYE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
AN AZAMEROCYANINE DYE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2165339A
Cited
US2170804A
Cited
US2216441A
Cited
US2185182A
Cited
GB514621A
Cited
US2394068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |