US3247211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanomethylidene quinolines
Assignee: Eastman Kodak Co
•
Filing: 1963-01-18
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Granted: 1966-04-19
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Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 Max A Weaver
- 👤 David J Wallace
- 👤 James M Straley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/12; C07D215/14; C07D215/04; C07D215/06; C07D215/16; C07D215/20; C09; C09B; C09B23/00; C09B23/0008; C09B23/005; C09B23/0058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A METHINE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A METHINE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2220129A
Cited
US2330203A
Cited
US2600380A
Cited
US2556146A
Cited
US3036876A
Cited
US3023213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |