Patent US2691652A successfully refreshed from Google Patents.
US2691652A
Expired / Lapsed
US
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Acyloxy polymethine dyes
Assignee: Eastman Kodak Co
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Filing: 1951-11-17
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Granted: 1954-10-12
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Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Earl Van Lare
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE ACYLOXY POLYMETHINE DYES SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
THE ACYLOXY POLYMETHINE DYES SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |