Patent US3241947A successfully refreshed from Google Patents.
US3241947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated particulate fertilizer
Assignee: Union Oil Company of California
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Filing: 1962-10-16
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Granted: 1966-03-22
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Expires: 1982-10-16
Abstract
No abstract record available.
Inventors
- 👤 Donald C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:31
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE TREATMENT OF SOLID AMMONIUM NITRATE THAT COMPRISES ADMIXING PARTICLES OF SAID SOLID AMMONIUM NITRATE WITH A SOLID CALCIUM SULFATE HYDRATE SALT, HEATING THE ADMIXED SOLIDS TO A TEMPERATURE ABOVE ABOUT 220*F. BUT BELOW THE MELTING POINT TEMPERATURE OF SAID AMMONIUMA NITRATE TO CAUSE AN ENDOTHERMIC REACTION BETWEEN SAID SOLIDS, TERMINATING SAID HEATING WHEN SAID REACTION OCCURS AND RECOVERING A SOLID COMPOSITION HAVING A CORE COMPRISING SAID AMMONIUM NITRATE AND AN ENCAPSULATING LAYER OF THE PRODUCT OF SAID REACTION.
Claim 2
Dependent Claim
79 words
THE TREATMENT OF SOLID AMMONIUM NITRATE THAT COMPRISES ADMIXING PARTICLES OF SAID SOLID AMMONIUM NITRATE WITH A SOLID CALCIUM SULFATE HYDRATE SALT, HEATING THE ADMIXED SOLIDS TO A TEMPERATURE ABOVE ABOUT 220*F. BUT BELOW THE MELTING POINT TEMPERATURE OF SAID AMMONIUMA NITRATE TO CAUSE AN ENDOTHERMIC REACTION BETWEEN SAID SOLIDS, TERMINATING SAID HEATING WHEN SAID REACTION OCCURS AND RECOVERING A SOLID COMPOSITION HAVING A CORE COMPRISING SAID AMMONIUM NITRATE AND AN ENCAPSULATING LAYER OF THE PRODUCT OF SAID REACTION.
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |