US3192032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making slow release urea fertilizers
Assignee: Sunoco Inc
•
Filing: 1963-10-24
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Granted: 1965-06-29
•
Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Charles L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
C; C05; C05G; C05G5/00; C05G5/30; C05G5/38; C05G3/00; C05G3/40; C05G3/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
METHOD OF FORMING A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX WHICH WHEN IN MOLTEN NORMALLY REACTS WITH SOLID UREA TO FORM AN ADDUCT WHICH COMPRISES (1) HEATING SAID PARAFFIN WAX TO ABOVE ITS MELTING POINT, (2) ADDING TO AND DISSOLVING IN THE RESULTING MOLTEN PARAFFIN WAX AN ADDUCT INHIBITOR SELECTED FROM THE GROUP CONSISTING OF NAPHTHENIC ACIDS HAVING A MOLECULAR WEIGHT OF 200-800 AND METAL SALTS THEREOF, THE AMOUNT OF SAID ADDUCT INHIBITOR BEING AT LEAST 0.5% BY WEIGHT OF SAID MOLTEN PARAFFIN WAX, (3) DISPERSING SOLID UREA IN THE MOLTEN PARAFFIN WAX CONTAINING SAID INHIBITOR, AND (4) COOLING THE RESULTING DISPERSION TO BELOW THE MELTING POINT OF THE WAX WHEREBY A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN SOLID PARAFFIN WAS IS OBTAINED.
Claim 2
Dependent Claim
135 words
METHOD OF FORMING A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX WHICH WHEN IN MOLTEN NORMALLY REACTS WITH SOLID UREA TO FORM AN ADDUCT WHICH COMPRISES (1) HEATING SAID PARAFFIN WAX TO ABOVE ITS MELTING POINT, (2) ADDING TO AND DISSOLVING IN THE RESULTING MOLTEN PARAFFIN WAX AN ADDUCT INHIBITOR SELECTED FROM THE GROUP CONSISTING OF NAPHTHENIC ACIDS HAVING A MOLECULAR WEIGHT OF 200-800 AND METAL SALTS THEREOF, THE AMOUNT OF SAID ADDUCT INHIBITOR BEING AT LEAST 0.5% BY WEIGHT OF SAID MOLTEN PARAFFIN WAX, (3) DISPERSING SOLID UREA IN THE MOLTEN PARAFFIN WAX CONTAINING SAID INHIBITOR, AND (4) COOLING THE RESULTING DISPERSION TO BELOW THE MELTING POINT OF THE WAX WHEREBY A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN SOLID PARAFFIN WAS IS OBTAINED.
References Cited (Backward Citations)
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Cited
US2513997A
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US2727832A
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US2936226A
Cited
US3014783A
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US3096196A
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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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |