Patent US2921067A successfully refreshed from Google Patents.
US2921067A
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Method of making carbocyanine and merocarbocyanine spectral sensitizing dyes
Assignee: Eastman Kodak Co
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Filing: 1957-07-10
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Granted: 1960-01-12
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Expires: 1977-07-10
Abstract
No abstract record available.
Inventors
- 👤 Larive Henri
- 👤 Edouard M Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:52
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/10; C09B23/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
31 words
IN A PROCESS FOR PREPARING POLYMETHINE DYES COMPRISING HEATING TO A TEMPERATURE OF FROM 50* TO 150*C. A MOLEUCLE OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
31 words
IN A PROCESS FOR PREPARING POLYMETHINE DYES COMPRISING HEATING TO A TEMPERATURE OF FROM 50* TO 150*C. A MOLEUCLE OF A COMPOUND SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
63 words
IN A PROCESS FOR PREPARING A SYMMETRICAL CARBOCYANINE DYE COMPRISING HEATING TO A TEMPERATURE OF FROM 50* TO 150*C., TWO MOLECULES OF A BENZOXAZOLE LOWER ALKYL SALT WITH ONE MOLEUCLE OF A TRI(LOWER ALKYL)ORTHOCARBOXYLATE IN THE PRESENCE OF 2RRI(LOWER ALKYL)AMINE, THE STEP COMPRISING HEATING SAID COMPOUND TOGETHER UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF A REACTION MEDIUM CONSISTING OF A MONOHYDRIC PHENOL.
Claim 4
Dependent Claim
63 words
IN A PROCESS FOR PREPARING A SYMMETRICAL CARBOCYANINE DYE COMPRISING HEATING TO A TEMPERATURE OF FROM 50* TO 150*C., TWO MOLECULES OF A BENZOXAZOLE LOWER ALKYL SALT WITH ONE MOLEUCLE OF A TRI(LOWER ALKYL)ORTHOCARBOXYLATE IN THE PRESENCE OF 2RRI(LOWER ALKYL)AMINE, THE STEP COMPRISING HEATING SAID COMPOUND TOGETHER UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF A REACTION MEDIUM CONSISTING OF A MONOHYDRIC PHENOL.
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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |