US3149105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel synthesis of cyanines and merocyanines
Assignee: Eastman Kodak Co
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Filing: 1961-09-14
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Granted: 1964-09-15
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 Larive Henri
- 👤 Rene J Dennilauler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:54
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/102; C09B23/02; C09B23/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR PREPARING 3,3''-DIMETHYLOXATHIACYANINE CHLORIDE COMPRISING THE STEPS: (1) MIXING 3-METHYL-2(3H)-BENZOXAZOLINE, PHOSPHOROUS PENTACHLORIDE AND PHOSPHORUOS OXYCHLORIDE AT A TEMPERATURE BELOW 20*C. TO PREPARE 2-CHLORO-3METHYLBENZOXAZOLIUM CHLORIDE; AND (2) MIXING SAID 2-CHLORO-3-METHYLBENZOAXAZOLIUM CHLORIDE AND 2,3-DIMETHYLBENZOTHIAZOLIUM METHYLSULFATE DISSOLVED IN A CRESOL IN THE PRESENCE OF TRIETHYLAMINE.
Claim 2
Dependent Claim
44 words
A PROCESS FOR PREPARING 3,3''-DIMETHYLOXATHIACYANINE CHLORIDE COMPRISING THE STEPS: (1) MIXING 3-METHYL-2(3H)-BENZOXAZOLINE, PHOSPHOROUS PENTACHLORIDE AND PHOSPHORUOS OXYCHLORIDE AT A TEMPERATURE BELOW 20*C. TO PREPARE 2-CHLORO-3METHYLBENZOXAZOLIUM CHLORIDE; AND (2) MIXING SAID 2-CHLORO-3-METHYLBENZOAXAZOLIUM CHLORIDE AND 2,3-DIMETHYLBENZOTHIAZOLIUM METHYLSULFATE DISSOLVED IN A CRESOL IN THE PRESENCE OF TRIETHYLAMINE.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |