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Patent US3403992A successfully refreshed from Google Patents.
US3403992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating soil comprising adding a fertilizer and a chelating agent to the soil
Assignee: WR Grace and Co
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Filing: 1954-03-05
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Granted: 1968-10-01
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Expires: 1974-03-05
Abstract
No abstract record available.
Inventors
- 👤 Busch Georg Ludvig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:00
CPC Classifications
C; C05; C05G; C05G3/00; C05G3/80; Y; Y10; Y10S; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN A METHOD OF ENHANCING THE GROWTH OF PLANT LIFE IN EARTH SOILS, THE STEP WHICH COMPRISES ADDING TO THE SOIL IN WHICH THE PLANT LIFE IS GROWN A SMALL AMOUNT OF A MICROBIOLOGICALLY STABLE WATER-SOLUBLE ORGANIC CHELATING AGENT IN ADMIXTURE WITH COMMERCIAL FERTILIZER.
Claim 2
Dependent Claim
44 words
IN A METHOD OF ENHANCING THE GROWTH OF PLANT LIFE IN EARTH SOILS, THE STEP WHICH COMPRISES ADDING TO THE SOIL IN WHICH THE PLANT LIFE IS GROWN A SMALL AMOUNT OF A MICROBIOLOGICALLY STABLE WATER-SOLUBLE ORGANIC CHELATING AGENT IN ADMIXTURE WITH COMMERCIAL FERTILIZER.
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |