US3373009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nutrient plant matrix
Assignee: Dow Chemical Co
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Filing: 1964-07-30
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Granted: 1968-03-12
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Malcolm E Pruitt
- 👤 Joseph M Baggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
C; C05; C05D; C05D9/00; Y; Y10; Y10S; Y10S71/00; Y10S71/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN INTEGRAL NUTRIENT PLANT GROWTH MEDIUM CONSISTING ESSENTIALLY OF A STABLE, WATER-INSOLUBLE, OPEN-CELLED, FOAMED POLYMER MATRIX HAVING INTIMATELY IMBEDDED THEREIN AS AN INTEGRAL PART THEREOF, PLANT NUTRIENTS IN A LEACH RESISTANT NUTRIENT MIXTURE, WHEREIN SAID LEACH RESISTANT NUTRIENT MIXTURE CONTAINS FROM ABOUT 2 TO 60 PARTS BY WEIGHT OF A SUBSTANTIALLY INSOLUBLE SALT MIXTURE SELECTED FROM THE GROUP CONSISTING OF SUBSTANTIALLY WATER-INSOLUBLE INORGANIC SALTS, FRITTED SALTS AND RESIN IMBEDDED INORGANIC SALTS AND FROM ABOUT 0.3 TO 7.8 PARTS BY WEIGHT OF NITROGEN CALCULATED AS ELEMENTAL NITROGEN, WHEREIN SAID NITROGEN IS SUPPLIED AT LEAST IN PART AS NITRATE EXCHANGED ON AN ANION EXCHANGE RESIN, AND WHEREIN SAID LEACH RESISTANT NUTRIENT MIXTURE IS ADDED IN AN AMOUNT WHICH DOES NOT EXCEED ABOUT 65 PERCENT OF THE WEIGHT OF THE POLYMER MIXTURE PRIOR TO FOAMING.
Claim 2
Dependent Claim
132 words
AN INTEGRAL NUTRIENT PLANT GROWTH MEDIUM CONSISTING ESSENTIALLY OF A STABLE, WATER-INSOLUBLE, OPEN-CELLED, FOAMED POLYMER MATRIX HAVING INTIMATELY IMBEDDED THEREIN AS AN INTEGRAL PART THEREOF, PLANT NUTRIENTS IN A LEACH RESISTANT NUTRIENT MIXTURE, WHEREIN SAID LEACH RESISTANT NUTRIENT MIXTURE CONTAINS FROM ABOUT 2 TO 60 PARTS BY WEIGHT OF A SUBSTANTIALLY INSOLUBLE SALT MIXTURE SELECTED FROM THE GROUP CONSISTING OF SUBSTANTIALLY WATER-INSOLUBLE INORGANIC SALTS, FRITTED SALTS AND RESIN IMBEDDED INORGANIC SALTS AND FROM ABOUT 0.3 TO 7.8 PARTS BY WEIGHT OF NITROGEN CALCULATED AS ELEMENTAL NITROGEN, WHEREIN SAID NITROGEN IS SUPPLIED AT LEAST IN PART AS NITRATE EXCHANGED ON AN ANION EXCHANGE RESIN, AND WHEREIN SAID LEACH RESISTANT NUTRIENT MIXTURE IS ADDED IN AN AMOUNT WHICH DOES NOT EXCEED ABOUT 65 PERCENT OF THE WEIGHT OF THE POLYMER MIXTURE PRIOR TO FOAMING.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |