US3644448A
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Crystalline hydrates of alkali metal salts of zinc trans-1 2-diaminocyclohexane-n n n' n'-tetraacetate
Assignee: Cooper Tinsley Laboratories Inc
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Filing: 1969-11-13
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Granted: 1972-02-22
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Expires: 1989-11-13
Abstract
Abstract THE CRYSTALLINE HYDRATES OF THE SODIUM AND POTASSIUM SALTS OF THE ZINC CHELATE OF TRANS-1,2-DIAMINOCYCLOHEXANEN,N,N''N''-TETRAACETIC ACID (NA2ZNCDTA AND K2ZNCDTA)
Inventors
- 👤 Robert C O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:16
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/003; A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 0
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |