US3337540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methine dyes
Assignee: Gevaert Photo Producten NV
•
Filing: 1963-04-10
•
Granted: 1967-08-22
•
Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Libeer Marcel Jan
- 👤 Pattijn Hendrik Adolf
- 👤 Nys Jean Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/18; C07D471/00; C07D471/02; C07D471/04; C07D487/00; C07D487/02; C07D487/04; C09; C09B; C09B23/00; C09B23/02; C09B23/10; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0635; G03G5/0637; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
AN ASYMMETRICAL METHINE DYE SALT OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
10 words
AN ASYMMETRICAL METHINE DYE SALT OF THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
5 words
THE DYESTUFF OF THE FORMULA:
Claim 4
Dependent Claim
5 words
THE DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US2304981A
Cited
US2689849A
Cited
US2743274A
Cited
US2865749A
Cited
US2870014A
Cited
US2895955A
Cited
US2984664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |