Patent US4147235A successfully refreshed from Google Patents.
Patent US3860718A successfully refreshed from Google Patents.
US3860718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
IMIDAZO (2,1-b) THIAZOLE AND THIAZOLO (3,2-a) BENZIMIDAZOLE QUATERNARY SALTS HYPOGLYCEMIC AGENTS
Assignee: Pfizer Inc
•
Filing: 1973-09-20
•
Granted: 1975-01-14
•
Expires: 1993-09-20
Abstract
Abstract The use of quaternary 7-substituted imidazo(2,1-b)thiazolium and 9-substituted thiazolo(3,2-a)benzimidazolium salts as blood-sugar lowering agents.
Inventors
- 👤 Donald E Kuhla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:30
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61K31/425
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
A method of claim 1 wherein X is chloro, R1 is benzyl, R2, R4 and R5 are each hydrogen and R3 is alkyl containing from 1 to 3 carbon atoms.
Claim 2
Dependent Claim
11 words
A method of claim 2 wherein the compound is 3-methyl-7-benzyl-5,6-dihydroimidazo(2,1-b)thiazolium chloride.
Claim 3
Dependent Claim
11 words
A method of claim 2 wherein the compound is 3-methyl-7-benzyl-imidazo(2,1-b)thiazolium chloride.
Claim 4
Dependent Claim
30 words
A method of claim 1 wherein X is chloro, R1 is chlorobenzyl, R2, R4 and R5 are each hydrogen and R3 is alkyl containing from 1 to 3 carbon atoms.
Claim 5
Dependent Claim
11 words
A method of claim 5 wherein the compound is 3-methyl-7-(o-chlorobenzyl)imidazo(2,1-b)thiazolium chloride.
Claim 6
Dependent Claim
11 words
A method of claim 5 wherein the compound is 3-methyl-7-(p-chlorobenzyl)imidazo(2,1-b)thiazolium chloride.
Claim 7
Dependent Claim
20 words
A method of claim 1 wherein X is chloro, R2, R3 and R5 are each hydrogen and R4 is phenyl.
Claim 8
Dependent Claim
11 words
A method of claim 8 wherein the compound is 6-phenyl-7-benzylimidazo(2,1-b)thiazolium chloride.
Claim 9
Dependent Claim
41 words
A method of claim 1 wherein X is bromo, R2 is hydrogen, R3 is alkyl containing from 1 to 3 carbon atoms and R4 and R5 taken together with the carbon atoms to which they are attached form a 1,2-phenylene ring.
Claim 10
Dependent Claim
11 words
A method of claim 10 wherein the compound is 3-methyl-9-benzylthiazolo(3,2-a)benzimidazolium bromide.
Claim 11
Dependent Claim
20 words
A method of claim 1 wherein X is bromo, R1 is benzyl and R2, R4 and R5 are each hydrogen.
Claim 12
Dependent Claim
11 words
A method of claIm 12 wherein the compound is 3-adamantyl-7-benzyl-5,6-dihydroimidazo(2,1-b)thiazolium bromide.
Claim 13
Dependent Claim
20 words
A method of claim 1 wherein X is bromo, R1 is benzyl and R2, R3 and R5 are each hydrogen.
Claim 14
Dependent Claim
11 words
A method of claim 14 wherein the compound is 6-2,4-dimethylphenyl)-7-benzylimidazo(2,1-b)thiazolium bromide.
References Cited (Backward Citations)
US3364112A
Cited
US3542802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |