US3252786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow release fertilizers and method of making
Assignee: Sunoco Inc
•
Filing: 1963-09-11
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Granted: 1966-05-24
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Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 Andrew J Bozzelli
- 👤 Steven G Belak
- 👤 Robert H Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:21
CPC Classifications
C; C05; C05C; C05C9/00; C05B; C05B1/00; C05B1/04; C05C9/005; C05G; C05G5/00; C05G5/30; C05G5/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A SLOW RELEASE FERTILIZER COMPOSITION COMPRISING A DISPERSION OF SOLID UREA IN SOLID PETROLEUM WAX SAID COMPOSITION BEING CHARACTERIZED IN THAT SUBSTANTIALLY ALL THE PARTICLES OF SAID SOLID UREA ARE SURROUNDED BY AND ENCASED IN SAID PETROLEUM WAX, SAID PETROLEUM WAX HAVING DISSOLVED THEREIN IN A MINOR AMOUNT OF ROSIN SELECTED FROM THE GROUP CONSISTING OF (1) POLYMERIZED WOOD ROSIN, (2) HYDROGENATED WOOD ROSIN, (3) MONO AND POLYHYDRIC ALCOHOL ESTERS OF POLYMERIZED, HYDROGENATED, AND UNMODIFIED WOOD ROSIN, AND (4) POLYVALENT METAL SALTS OF POLYMERIZED, HYDROGENATED, AND UNMODIFIED WOOD ROSIN, EACH OF (1), (2), (3), AND (4) BEING PARTIALLY OXIDIZED TO AN EXTENT EQUIVALENT TO OXIDATION AT 140*F. FOR A PERIOD OF 1-8 DAYS, SAID PARTIAL OXIDATION BEING SUFFICIENT TO RESULT IN A DECREASED RATE OF LEACHING WHEN SAID COMPOSITION IS CONTACTED WITH WATER, SAID MINOR AMOUNT BEING BASED ON THE TOTAL WEIGHT OF ROSIN AND SAID WAX.
Claim 2
Dependent Claim
147 words
A SLOW RELEASE FERTILIZER COMPOSITION COMPRISING A DISPERSION OF SOLID UREA IN SOLID PETROLEUM WAX SAID COMPOSITION BEING CHARACTERIZED IN THAT SUBSTANTIALLY ALL THE PARTICLES OF SAID SOLID UREA ARE SURROUNDED BY AND ENCASED IN SAID PETROLEUM WAX, SAID PETROLEUM WAX HAVING DISSOLVED THEREIN IN A MINOR AMOUNT OF ROSIN SELECTED FROM THE GROUP CONSISTING OF (1) POLYMERIZED WOOD ROSIN, (2) HYDROGENATED WOOD ROSIN, (3) MONO AND POLYHYDRIC ALCOHOL ESTERS OF POLYMERIZED, HYDROGENATED, AND UNMODIFIED WOOD ROSIN, AND (4) POLYVALENT METAL SALTS OF POLYMERIZED, HYDROGENATED, AND UNMODIFIED WOOD ROSIN, EACH OF (1), (2), (3), AND (4) BEING PARTIALLY OXIDIZED TO AN EXTENT EQUIVALENT TO OXIDATION AT 140*F. FOR A PERIOD OF 1-8 DAYS, SAID PARTIAL OXIDATION BEING SUFFICIENT TO RESULT IN A DECREASED RATE OF LEACHING WHEN SAID COMPOSITION IS CONTACTED WITH WATER, SAID MINOR AMOUNT BEING BASED ON THE TOTAL WEIGHT OF ROSIN AND SAID WAX.
Claim 3
Dependent Claim
123 words
METHOD OF FORMING A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX WHICH WHEN IN MOLTEN STATE NORMALLY REACTS WITH SOLID UREA TO FORM AN ADDUCT WHICH COMPRISES (1) HEATING SAID PARAFFIN WAX TO ABOVE ITS MELTING POINT WHEREBY MOLTEN PARAFFIN WAX NORMALLY SUSCEPTIBLE TO ADDUCTION IS OBTAINED, (2) DISSOLVING IN SAID MOLTEN PARAFFIN WAX AN ADDUCT INHIBITING AMOUNT OF ROSIN IN THE RANGE OF 1-20% BY WEIGHT OF SAID MOLTEN PARAFFIN WAX, (3) DISPERSING SOLID UREA IN THE MOLTEN PARAFFIN WAX CONTAINING SAID ADDUCT INHIBITOR, AND (4) COOLING THE RESULTING DISPERSION TO BELOW THE MELTING POINT OF SAID WAX WHEREBY A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN SOLID PARAFFIN WAX IS CONTAINED.
Claim 4
Dependent Claim
123 words
METHOD OF FORMING A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN A SOLID PARAFFIN WAX WHICH WHEN IN MOLTEN STATE NORMALLY REACTS WITH SOLID UREA TO FORM AN ADDUCT WHICH COMPRISES (1) HEATING SAID PARAFFIN WAX TO ABOVE ITS MELTING POINT WHEREBY MOLTEN PARAFFIN WAX NORMALLY SUSCEPTIBLE TO ADDUCTION IS OBTAINED, (2) DISSOLVING IN SAID MOLTEN PARAFFIN WAX AN ADDUCT INHIBITING AMOUNT OF ROSIN IN THE RANGE OF 1-20% BY WEIGHT OF SAID MOLTEN PARAFFIN WAX, (3) DISPERSING SOLID UREA IN THE MOLTEN PARAFFIN WAX CONTAINING SAID ADDUCT INHIBITOR, AND (4) COOLING THE RESULTING DISPERSION TO BELOW THE MELTING POINT OF SAID WAX WHEREBY A SLOW RELEASE FERTILIZER COMPRISING A DISPERSION OF SOLID UREA IN SOLID PARAFFIN WAX IS CONTAINED.
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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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |