US2739149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical carbocyanine dyes
Assignee: Eastman Kodak Co
•
Filing: 1953-02-27
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Granted: 1956-03-20
•
Expires: 1973-02-27
Abstract
No abstract record available.
Inventors
- 👤 Earl J Van Lare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:29
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A SYNMETRICAL CARBOCYANINE DYE SELECTED FROM THE GROUP CONSISTING OF 5,5''-DICHLORO-1,1'',3,3''-TETRETHYLBENZIMIDAZOLOCARBOCYANINE IODIDE; 5,5'',6,6''-TETRACHLORO1,1'',3,3''-TETRAETHYLBENZIMIDAZOLOCARBOCYANINE IODIDE; 5,5''DICHLORI - 1,1'',3,3'' - TETRAMETHYLBENZIMIDAZOLOCARBOCY5,5''ANINE IDIDE; 1,1'',3,3''-TETRALLYL-5,5''-DICHLOROBENZIMIDAZOLOCARBOCYANINE IODIDE; AND 5,5''-DICHLORO-3,3''-DIETHYL1,1''-DIPHENYLBENZIMIDAZOLOCARBOCYANINE IODIDE.
Claim 2
Dependent Claim
25 words
A SYNMETRICAL CARBOCYANINE DYE SELECTED FROM THE GROUP CONSISTING OF 5,5''-DICHLORO-1,1'',3,3''-TETRETHYLBENZIMIDAZOLOCARBOCYANINE IODIDE; 5,5'',6,6''-TETRACHLORO1,1'',3,3''-TETRAETHYLBENZIMIDAZOLOCARBOCYANINE IODIDE; 5,5''DICHLORI - 1,1'',3,3'' - TETRAMETHYLBENZIMIDAZOLOCARBOCY5,5''ANINE IDIDE; 1,1'',3,3''-TETRALLYL-5,5''-DICHLOROBENZIMIDAZOLOCARBOCYANINE IODIDE; AND 5,5''-DICHLORO-3,3''-DIETHYL1,1''-DIPHENYLBENZIMIDAZOLOCARBOCYANINE IODIDE.
References Cited (Backward Citations)
US2354524A
Cited
US2537880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |