Patent US2537876A successfully refreshed from Google Patents.
US2537876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-arylthiazolo monomethine
Assignee: —
•
Filing: —
•
Granted: 1951-01-09
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Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:56
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C07; C07D; C07D421/00; C07D421/02; C07D293/00; C07D293/10; C07D293/12; C07D417/00; C07D417/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS FOR PREPARING N-ARYLTHIAZOLO MONOMETHINE CYANINE DYE COMPRISING HEATING AN A-HALOGENOKETONE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
21 words
A PROCESS FOR PREPARING N-ARYLTHIAZOLO MONOMETHINE CYANINE DYE COMPRISING HEATING AN A-HALOGENOKETONE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |