US2658889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted phenylazomalononitriles
Assignee: F Hoffmann La Roche AG
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Filing: 1950-08-22
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Granted: 1953-11-10
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Expires: 1970-08-22
Abstract
No abstract record available.
Inventors
- 👤 Goldberg Moses Wolf
- 👤 Rachlin Albert Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:46
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/63; C07C255/65; C07C255/67
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A P-SUBSTITUTED PHENYLAZOMALONONITRILE WHEREIN THE P-SUBSTITUENT IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKOXY, LOWER ALKENOXY AND LOWER CARBOXYLIC ACID ACYLAMIDO RADICALS.
Claim 2
Dependent Claim
23 words
A P-SUBSTITUTED PHENYLAZOMALONONITRILE WHEREIN THE P-SUBSTITUENT IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKOXY, LOWER ALKENOXY AND LOWER CARBOXYLIC ACID ACYLAMIDO RADICALS.
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |