US2494032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styryl dyes
Assignee: Eastman Kodak Co
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Filing: 1946-06-03
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Granted: 1950-01-10
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Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Leslie G S Brooker
- 👤 Frank L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:49
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE STYRYL DYES WHICH ARE REPRESENTED BY THE FOLLOWING GENERAL FORMULA: WHEREIN R AND R1 EACH REPRESENTS AN ALKYL GROUP OF THE FORMULA CNH2N+1 WHEREIN N REPRESENTS A POSITIVE INTEGER, R2 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF ARYL GROUPS OF THE BENZENE SERIES AND ARYL GROUPS OF THE NAPHTHALENE SERIES, X REPRESENTS AN ANION AND Z REPRESENTS THE NON-METALLIC ATOMS NECESSARY TO COMPLETE A HETEROCYLIC NUCLEUS SELECTED FROM THE GROUP CONSISTING OF BENZOXAZOLE, BENZOTHIASZOLE, BENZOSELENAZOLE, A-NAPHTHOXAZOLE, B-NAPHTHOXAZOLE, A-NAPHTHOTHIAZOLE AND B-NAPHTHOTHIAZOLE NUCLEI.
Claim 2
Dependent Claim
84 words
THE STYRYL DYES WHICH ARE REPRESENTED BY THE FOLLOWING GENERAL FORMULA: WHEREIN R AND R1 EACH REPRESENTS AN ALKYL GROUP OF THE FORMULA CNH2N+1 WHEREIN N REPRESENTS A POSITIVE INTEGER, R2 REPRESENTS A MEMBER SELECTED FROM THE GROUP CONSISTING OF ARYL GROUPS OF THE BENZENE SERIES AND ARYL GROUPS OF THE NAPHTHALENE SERIES, X REPRESENTS AN ANION AND Z REPRESENTS THE NON-METALLIC ATOMS NECESSARY TO COMPLETE A HETEROCYLIC NUCLEUS SELECTED FROM THE GROUP CONSISTING OF BENZOXAZOLE, BENZOTHIASZOLE, BENZOSELENAZOLE, A-NAPHTHOXAZOLE, B-NAPHTHOXAZOLE, A-NAPHTHOTHIAZOLE AND B-NAPHTHOTHIAZOLE NUCLEI.
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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |