US2968833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for prilling ammonium nitrate
Assignee: Phillips Petroleum Co
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Filing: 1957-05-17
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Granted: 1961-01-24
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Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
- 👤 Haven Clark G De
- 👤 Richard O Welty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:13
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02; B; B01; B01J; B01J2/00; B01J2/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN THE PRODUCTION OF UNIFORMLY SIZED PRILLS FROM A MOLTEN INORGANIC SALT SOLUTION, PARTICULARLY CONCENTRATED AMMONIUM NITRATE METLS, EMPLOYING A METHOD WHERE SAID SOLUTION IS SPRAYED FROM A RESTRICTING ZONE THROUGH A PLURALITY OF KNIFE-EDGED ORIFICES INTO DIRECTED CONTACT WITH A LIQUID-SOLIDIFYING MEDIUM, SUCH AS AIR, THE IMPROVEMENT COMPRISING APPLYING TO SAID LIQUID IN SAID ZONE VIBRATIONS OF A PREDETERMINED FREQUENCY WITHIN THE RANGE OF ABOUT 300 TO ABOUT 1,400 C.P.S., THEREBY INJECTING SUBSTANTIALLY SPHERICAL DROPLETS OF SAID LIQUID FROM SAID RESTRICTING ZONE INTO SAID SOLIDIFYING MEDIUM.
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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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |