US3076700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer compositions and process
Assignee: OM Scott and Sons Co
•
Filing: 1957-10-31
•
Granted: 1963-02-05
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Victor A Renner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:02
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/005; Y; Y10; Y10S; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A MTHOD FOR PREPARING A FERTILIZER COMPOSITION WHICH COMPRISES ADJUSTING THE PH OF A UREA-FORMALDEHYDE SOLUTION CONTANING UREA AND FORMALDEHYDE IN APPROXIMATELY A 1-3:1 MOL RATIO TO A PH VALUE OF ABOUT 7-9.5 TO FORM A METHYLOL UREAS SOLUTION, AND ACIDIFYING THE SOLUTION TO A PH OF APPROXIMATELY 3.0-4.0 AND COATING AND IMPREGNATING PARTICLES OF EXPANDED VERMICULITE WITH SAID SOLUTION BY DISPERSING THE SOLUTION IN A SUFFICIENT FLOWABLE STATE TO PERMIT IMPREGNATION OF SAID PARTICLES WHILE MIXING UNDER CONDITIONS SUFFICIENT TO CAUSE THE INGREDIENTS THEREOF TO UNDERGO A CONDENSATION REACTION TO FORM A PARTIALLY INSOLUBLE RESINOUS METHYLENE UREAS NITROGEN-CONTAINING REACTION PRODUCT IN SITU ABOUT SAID PARTICLES, SAID MIXTURES BEING BUFFERED BY SAID VERMICULITE TO A FINAL PH RANGE OF APPROXIMATELY 4.5 TO 6.5 WHEREBY SAID FERTILIZER COMPOSITION HAS AT LEAST 1.3 OF THE TOTAL NITROGEN IN WATER INSOLUBLE FORM WITH AN AVAILABILITY INDEX OF AT LEAST 35%.
Claim 2
Dependent Claim
147 words
A MTHOD FOR PREPARING A FERTILIZER COMPOSITION WHICH COMPRISES ADJUSTING THE PH OF A UREA-FORMALDEHYDE SOLUTION CONTANING UREA AND FORMALDEHYDE IN APPROXIMATELY A 1-3:1 MOL RATIO TO A PH VALUE OF ABOUT 7-9.5 TO FORM A METHYLOL UREAS SOLUTION, AND ACIDIFYING THE SOLUTION TO A PH OF APPROXIMATELY 3.0-4.0 AND COATING AND IMPREGNATING PARTICLES OF EXPANDED VERMICULITE WITH SAID SOLUTION BY DISPERSING THE SOLUTION IN A SUFFICIENT FLOWABLE STATE TO PERMIT IMPREGNATION OF SAID PARTICLES WHILE MIXING UNDER CONDITIONS SUFFICIENT TO CAUSE THE INGREDIENTS THEREOF TO UNDERGO A CONDENSATION REACTION TO FORM A PARTIALLY INSOLUBLE RESINOUS METHYLENE UREAS NITROGEN-CONTAINING REACTION PRODUCT IN SITU ABOUT SAID PARTICLES, SAID MIXTURES BEING BUFFERED BY SAID VERMICULITE TO A FINAL PH RANGE OF APPROXIMATELY 4.5 TO 6.5 WHEREBY SAID FERTILIZER COMPOSITION HAS AT LEAST 1.3 OF THE TOTAL NITROGEN IN WATER INSOLUBLE FORM WITH AN AVAILABILITY INDEX OF AT LEAST 35%.
References Cited (Backward Citations)
US2618546A
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US2766283A
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US2779670A
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US2816826A
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US2669510A
Cited
US2810710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |