US2533206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing oxonol dyes
Assignee: Eastman Kodak Co
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Filing: 1949-02-24
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Granted: 1950-12-12
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Expires: 1969-02-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel G Dent
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:15
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PROCESS FOR PREPARING A DYE COMPRISING CONDENSING AN ORGANIC COMPOUND CONTAINING A KETO-METHYLENE (-CH2CO-) GROUP SELECTED FROM THE GROUP CONSISINT OF THOSE REPRESENTED BY THE FOLLOWING TWO GENERAL FORMULAS:
Claim 2
Dependent Claim
30 words
A PROCESS FOR PREPARING A DYE COMPRISING CONDENSING AN ORGANIC COMPOUND CONTAINING A KETO-METHYLENE (-CH2CO-) GROUP SELECTED FROM THE GROUP CONSISINT OF THOSE REPRESENTED BY THE FOLLOWING TWO GENERAL FORMULAS:
References Cited (Backward Citations)
US2274782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |