US2675375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arylazopyrimidine compounds and methods of making the same
Assignee: Wyeth Holdings LLC
•
Filing: 1951-07-14
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Granted: 1954-04-13
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Expires: 1971-07-14
Abstract
No abstract record available.
Inventors
- 👤 Harry W Marson
- 👤 Jackson P English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:23
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
30 words
A METHOD OF PREPARING 2-AMINO-5-PHENYLAZOPYRIMIDINE WHICH COMPRISES MIXING TOGETHER IN AN INERT SOLVENT AND ALLOWING THE MIXTURE TO REMAIN AT ROOM TEMPERATURE UP TO ABOUT 120* C. PHENYLAZOMALONALDEHYDE AND GUANIDINE.
References Cited (Backward Citations)
US2235638A
Cited
US2375735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |