US2859104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylenediamine derivatives and preparation
Assignee: Novartis Corp
•
Filing: 1952-10-02
•
Granted: 1958-11-04
•
Expires: 1972-10-02
Abstract
No abstract record available.
Inventors
- 👤 Kroll Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:15
CPC Classifications
C; C05; C05D; C05D9/00; C05D9/02; Y; Y10; Y10S; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
A MEMBER OF THE CLASS CONSISTING OF N,N-DIHYDROXYETHYL N'',N''-DICARBOXYMETHYL ETHYLENEDIAMINE, ITS WATERSOLUBLE SALTS WITH MONOVALENT CATIONS, AND ITS WATERSOLUBLE CHELATE COMPLEXES WITH DIVALENT AND HIGHER THAN DIVALENT METALS.
Claim 2
Dependent Claim
28 words
A MEMBER OF THE CLASS CONSISTING OF N,N-DIHYDROXYETHYL N'',N''-DICARBOXYMETHYL ETHYLENEDIAMINE, ITS WATERSOLUBLE SALTS WITH MONOVALENT CATIONS, AND ITS WATERSOLUBLE CHELATE COMPLEXES WITH DIVALENT AND HIGHER THAN DIVALENT METALS.
Claim 3
Dependent Claim
7 words
THE FERRIC CHELATE OF N,N-DIHYDROZYETHYL N'',N''DICARBOXYMETHYL ETHYLENEDIAMINE.
Claim 4
Dependent Claim
7 words
THE FERRIC CHELATE OF N,N-DIHYDROZYETHYL N'',N''DICARBOXYMETHYL ETHYLENEDIAMINE.
References Cited (Backward Citations)
US2129598A
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US2248400A
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US2407645A
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US2428353A
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US2413856A
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US2493654A
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US2526557A
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US2673213A
Cited
US2673214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |