Patent US3755325A successfully refreshed from Google Patents.
US3755325A
Expired / Lapsed
US
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Imidazolium quaternary salts and methods of preparing the same
Assignee: Merck and Co Inc
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Filing: 1971-08-31
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Granted: 1973-08-28
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Expires: 1991-08-31
Abstract
Abstract Imidazolium quaternary salts, specifically 3-(2-loweralkyl-4amino-5-pyrimidinylmethyl)-1,2-dialkyl substituted imidazolium quaternary salts, having anti-coccidial activity are provided.
Inventors
- 👤 R Clark
- 👤 A Pessolano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:37
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D233/00; C07D233/54; C07D233/56; C07D249/00; C07D249/02; C07D249/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
The compound of claim 1 which is 3-(2-methyl-4-amino-5-pyrimidinylmethyl)-1,2-dimethyl imidazolium halide hydrohalide.
Claim 2
Dependent Claim
11 words
The compound of claim 1 which is 3-(2-ethyl-4-amino-5-pyrimidinylmethyl)-1,2-dimethyl imidazolium halide hydrohalide.
Claim 3
Dependent Claim
11 words
The compound of claim 1 which is 3-(2-n-propyl-4-amino-5-pyrimidinylmethyl)-1,2-dimethyl imidazolium halide hydrohalide.
References Cited (Backward Citations)
US3030364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |