US4174319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
12-Alkyl-1,4,7,10-tetraazacyclotridecane
Assignee: Individual
•
Filing: 1978-01-23
•
Granted: 1979-11-13
•
Expires: 1998-01-23
Abstract
Abstract 12-alkyl-1,4,7,10-tetraazacyclotridecane of the formula ##STR1## wherein R is an alkyl group containing at least 8 carbon atoms. This compound can be used for capturing metal ions.
Inventors
- 👤 Yoshiaki Kobuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
12-alkyl-1,4,7,10-tetraazacyclotridecane represented by the formula: ##STR9## wherein R is a normal alkyl group having from 8 to 20 carbon atoms.
Claim 2
Dependent Claim
20 words
12-alkyl-1,4,7,10-tetraazacyclotridecane represented by the formula: ##STR9## wherein R is a normal alkyl group having from 8 to 20 carbon atoms.
Claim 3
Dependent Claim
19 words
The compound according to claim 1, wherein R is a 12, 14, 16, or 18 carbon atom alkyl group.
Claim 4
Dependent Claim
15 words
The compound according to claim 1, wherein the compound is represented by the formula: ##STR10##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |