Patent US3937733A successfully refreshed from Google Patents.
US3937733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of iodomethanesulfonic acid with organic bases
Assignee: Bayer Pharma AG
•
Filing: 1972-03-31
•
Granted: 1976-02-10
•
Expires: 1992-03-31
Abstract
Abstract Salts of iodomethanesulfonic acid and an organic base, more particularly, glucamine, N-alkyl- and N, N-dialkylglucamines and N-hydroxyalkyl- and N,N-di-hydroxyalkylglucamines, are useful as X-ray contrast agents, especially for spinal X-ray examination.
Inventors
- 👤 Hermann Ulbrich
- 👤 Wolfgang Beich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:06
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A myelographic salt of iodomethanesulfonic acid with an amine selected from the group consisting of glucamine, N-alkylglucamine, N,N-dialkylglucamine and hydroxyalkylglucamines of the latter and former alkylglucamines containing more than one carbon atom in the alkyl radical, said amine in all cases having up to a total of four carbon atoms in the alkyl portion.
Claim 2
Dependent Claim
54 words
A myelographic salt of iodomethanesulfonic acid with an amine selected from the group consisting of glucamine, N-alkylglucamine, N,N-dialkylglucamine and hydroxyalkylglucamines of the latter and former alkylglucamines containing more than one carbon atom in the alkyl radical, said amine in all cases having up to a total of four carbon atoms in the alkyl portion.
Claim 3
Dependent Claim
24 words
A salt of claim l, wherein the amine is selected from the group consisting of N-methylglucamine; N,N-dimethylglucamine; N-ethylglucamine; N-methyl,N-ethylglucamine; N,N-diethylglucamine; N-β-hydroxyethylglucamine; N-methyl,N-β-hydroxyethylglucamine and N,N-di-β-hydroxyethylglucamine.
Claim 4
Dependent Claim
11 words
A salt of claim 1, wherein said amine is an N-alkylglucamine.
Claim 5
Dependent Claim
11 words
A salt of claim 1, wherein said amine is an N,N-dialkylglucamine.
Claim 6
Dependent Claim
11 words
A salt of claim 1, wherein said amine is an N-hydroxyalkylglucamine.
Claim 7
Dependent Claim
11 words
A salt of claim 1, wherein said amine is an N,N-dihydroxyalkylglucamine.
Claim 8
Dependent Claim
36 words
A salt of claim 1, selected from the group consisting of the N-methylglucamine salt of iodomethanesulfonic acid, the N,N-dimethylglucamine salt of iodomethanesulfonic acid, the N-hydroxyethylglucamine salt of iodomethanesulfonic acid and the glucamine salt of iodomethanesulfonic acid.
Claim 9
Dependent Claim
11 words
A salt of claim 7, the N-methylglucamine salt of iodomethanesulfonic acid.
Claim 10
Dependent Claim
11 words
A salt of claim 7, the N,N-dimethylglucamine salt of iodomethanesulfonic acid.
Claim 11
Dependent Claim
11 words
A salt of claim 7, the N-β-hydroxyethylglucamine salt of iodomethanesulfonic acid.
Claim 12
Dependent Claim
11 words
A salt of claim 7, the glucamine salt of iodomethanesulfonic acid.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |