US2918369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-ionic benzimidazole cyanine dyes containing in alpha-position a cyano group on the methenyl chain
Assignee: GAF Chemicals Corp
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Filing: 1956-06-15
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Granted: 1959-12-22
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Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Norman J Doorenbos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0008; C09B23/005; C09B23/0058; C09B23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A LIGHT SENSITIVE SILVER HALIDE EMULSION CONTAINING AS A SENSITIZING DYE A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
24 words
A LIGHT SENSITIVE SILVER HALIDE EMULSION CONTAINING AS A SENSITIZING DYE A COMPOUND SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING 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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |