US4128556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain multioxymacrocycle compounds containing pyridyl as part of the macrocycle
Assignee: University of California, San Diego
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Filing: 1977-11-21
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Granted: 1978-12-05
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Expires: 1997-11-21
Abstract
Abstract Multiheteromacrocycles are disclosed that contain as part of the macrocycle, assemblies of 2,6-dimethylylpyridine (and their corresponding amine oxides), 2,5-dimethylylfuran, 2,5-dimethylyltetrahydrofuran, Diels-Alder adducts of 2,5-dimethylylfuran (and their reduction products), 2- and 4-substituted 1,3-dimethylbenzenes, pentamethylene, or p-phenylene coupled through oxygen to one another, or to ethylene, o-phenylene, or 1,1-binaphthyl-2,2- units (always coupled through oxygens) to form multidentate ligands for complexing selectively alkylammonium or metal cations.
Inventors
- 👤 Donald J. Cram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:46
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
A compound of the formula: ##STR159##
Claim 2
Dependent Claim
6 words
A compound of the formula: ##STR159##
Claim 3
Dependent Claim
6 words
A compound of the formula: ##STR160##
Claim 4
Dependent Claim
6 words
A compound of the formula: ##STR160##
Claim 5
Dependent Claim
6 words
A compound of the formula: ##STR161##
Claim 6
Dependent Claim
6 words
A compound of the formula: ##STR161##
References Cited (Backward Citations)
US3965116A
Cited
US4080337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |