US3065241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing certain tetrazoles
Assignee: AstraZeneca AB
•
Filing: 1961-01-18
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Granted: 1962-11-20
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Expires: 1981-01-18
Abstract
No abstract record available.
Inventors
- 👤 Ugi Ivar
- 👤 Meyr Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:00
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR THE PREPARATION OF A 1.5-DISUBSTITUTED TETRAZOLE WHICH COMPRISES MIXING TOGETHER IN AN INERT SOLVENT UNDER ANHYDROUS CONDITIONS (1) AN ORGANIC ISOCYANIDE HAVING THE FORMULA R3NC, (2) A CARBONYL COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
35 words
A PROCESS FOR THE PREPARATION OF A 1.5-DISUBSTITUTED TETRAZOLE WHICH COMPRISES MIXING TOGETHER IN AN INERT SOLVENT UNDER ANHYDROUS CONDITIONS (1) AN ORGANIC ISOCYANIDE HAVING THE FORMULA R3NC, (2) A CARBONYL COMPOUND HAVING THE 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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |