US2905692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of imidazoles
Assignee: Merck and Co Inc
•
Filing: 1958-02-28
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Granted: 1959-09-22
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Expires: 1978-02-28
Abstract
No abstract record available.
Inventors
- 👤 William J Paleveda
- 👤 Erwin F Schoenewaldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:32
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE PROCESS WHICH COMPRISES TREATING A DI-LOWER ALKYL TARTRATE DINITRATE WITH AMMONIUM ION AND AN ALDEHYDE OF THE FORMULA R''CHO AT A PH OF ABOUT 3.5 TO ABOUT 6.5 THEREBY FORMING A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
36 words
THE PROCESS WHICH COMPRISES TREATING A DI-LOWER ALKYL TARTRATE DINITRATE WITH AMMONIUM ION AND AN ALDEHYDE OF THE FORMULA R''CHO AT A PH OF ABOUT 3.5 TO ABOUT 6.5 THEREBY FORMING A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |