Patent US2953561A successfully refreshed from Google Patents.
US2953561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrostyryl dye bases and vinylogs thereof derived from 2-cyanomethylazoles
Assignee: GAF Chemicals Corp
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Filing: 1957-09-24
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Granted: 1960-09-20
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Expires: 1977-09-24
Abstract
No abstract record available.
Inventors
- 👤 Norman J Doorenbos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:16
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145; G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
A POLYMETHINE COMPOUND OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
A POLYMETHINE COMPOUND OF THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
7 words
A POLYMETHINE COMPOUND OF THE FOLLOWING FORMULA:
Claim 4
Dependent Claim
7 words
A POLYMETHINE COMPOUND 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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |