US3328404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of pyrazine
Assignee: Merck and Co Inc
•
Filing: 1966-08-25
•
Granted: 1967-06-27
•
Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Peter I Pollak
- 👤 Roger J Tull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:43
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/24; C07D241/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A PROCESS WHEREIN AN N-DISUBSTITUTED 3,5-DIAMINO6-HALOPYRAZINAMIDEINE (I) IS REACTED WITH A PRODUCT SELECTED FROM GUANIND AND AMINOGUANIDEINE (II) AND THE PRODUCT THUS OBTAINED THEN TREATED WITH A MINERAL ACID TO FORM THE CORRESPONDING 73,5-DIAMINO-6-HALOPYRAZINOYL) GUANIDINE AND (3,5-DIAMINO-6-HALOPYRAZINAMIDE)GUANIDINE RESPECTIVELY.
Claim 2
Dependent Claim
38 words
A PROCESS WHEREIN AN N-DISUBSTITUTED 3,5-DIAMINO6-HALOPYRAZINAMIDEINE (I) IS REACTED WITH A PRODUCT SELECTED FROM GUANIND AND AMINOGUANIDEINE (II) AND THE PRODUCT THUS OBTAINED THEN TREATED WITH A MINERAL ACID TO FORM THE CORRESPONDING 73,5-DIAMINO-6-HALOPYRAZINOYL) GUANIDINE AND (3,5-DIAMINO-6-HALOPYRAZINAMIDE)GUANIDINE RESPECTIVELY.
Claim 3
Dependent Claim
17 words
A PROCESS AS CLAIMED IN CLAIM 1 WHEREIN REACTANT I AND REACTANT II HAVE THE FOLLOWING STRUCTURE
Claim 4
Dependent Claim
5 words
A PRODUCT OF THE STRUCTURE
Claim 5
Dependent Claim
5 words
A PRODUCT OF THE STRUCTURE
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |