US4043998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(P-benzenediazonium)-ethylenediamine tetraacetic acid
Assignee: Leland Stanford Junior University
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Filing: 1976-08-09
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Granted: 1977-08-23
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Expires: 1996-08-09
Abstract
Abstract 1-(P-Benzenediazonium)-ethylenediaminetetraacetic acid is described. This material is a chelating agent which forms stable complexes with the ions of heavy metals including those having radioactive properties and also reacts readily and rapidly with biological molecules. The compound is a versatile reactive agent useful in introducing metal ions into biological molecules.
Inventors
- 👤 Claude F. Meares
- 👤 Michael W. Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:36
CPC Classifications
G; G21; G21H; G21H5/00; G21H5/02; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
Salts of 1-(p-Benzenediazonium)-ethylenediaminetetraacetic acid in which the anion is the anion of a strong acid.
Claim 2
Dependent Claim
15 words
Salts of 1-(p-Benzenediazonium)-ethylenediaminetetraacetic acid in which the anion is the anion of a strong acid.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |