Patent US3897444A successfully refreshed from Google Patents.
US3897444A
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US
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Pharmacologically active compounds
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1973-08-02
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Granted: 1975-07-29
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Expires: 1993-08-02
Abstract
Abstract N-Cyano-N''-heterocyclic-alkylguanidines which are inhibitors of histamine activity.
Inventors
- 👤 Graham John Durant
- 👤 John Colin Emmett
- 👤 Charon Robin Ganellin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:06
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61P; A61P43/00; C07D213/32; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D213/70; C07D213/72; C07D213/74; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07D233/00; C07D233/54; C07D233/64; C07D239/00; C07D239/02; C07D239/24; C07D239/26; C07D241/00; C07D241/02; C07D241/10; C07D241/12; C07D249/00; C07D249/02; C07D249/08; C07D261/00; C07D261/02; C07D261/06; C07D261/08; C07D263/00; C07D263/02; C07D263/30; C07D263/32; C07D275/00; C07D275/02; C07D277/00; C07D277/02; C07D277/20; C07D277/22; C07D277/26; C07D277/28; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
9 words
A compound of claim 1 wherein R is methyl.
Claim 4
Dependent Claim
24 words
A compound of claim 1 wherein Het is imidazole or thiazole attached through a carbon atom in said nucleus adjacent to a nitrogen atom.
Claim 5
Dependent Claim
9 words
A compound of claim 1, said compound being N-cyano-N''-methyl-N''''-(4-(4-imidazolylbutyl))guanidine.
Claim 6
Dependent Claim
9 words
A compound of claim 1, said compound being N-cyano-N''-methyl-N''''-(3-(4-imidazolylpropyl))guanidine.
Claim 7
Dependent Claim
9 words
A compound of claim 1, said compound being N-cyano-N''-methyl-N''''-(4-(2-thiazolylbutyl))guanidine.
References Cited (Backward Citations)
US3036083A
Cited
US3074955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |