US3780079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron chelate compound of tris(hydroxymethyl)phosphine oxide and nitrilotriacetic acid or alkali metal salts
Assignee: Hooker Chemical Corp
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Filing: 1971-09-27
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Granted: 1973-12-18
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Expires: 1991-09-27
Abstract
Abstract MIXTURES OF TRIS(HYDROXYMETHYL) PHOSPHINE OXIDE, AND NITRILOTRIACETIC ACID AS WELL AS THE ALKALI METAL SALTS THEREOF, EXHIBIT MARKED SYNERGISM AS SEQUESTRANT COMPOSITIONS OVER A BROAD PH RANGE. THE SEQUESTRANT COMPOSITIONS ARE USEFUL AS ADDITIVES FOR DETERGENTS, METAL CLEANING BATHS, PEROXIDE COMPOSITIONS AND DYES. THE C HELATE PRODUCTS ARE USEFUL IN THE FIELD OF AGRICULTURE FOR THE INTRODUCTION OF TRACE ELEMENTS INTO PLANT LIFE AND ESPECIALLY IN THE TREATMENT OF IRON CHLOROSIS IN PLANTS.
Inventors
- 👤 R Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C02F5/145; C05; C05D; C05D9/00; C05D9/02; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/33; C11D3/36
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |