Patent US2039535A successfully refreshed from Google Patents.
Patent US2528407A successfully refreshed from Google Patents.
US2528407A
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Method of granulating ammonium nitrate and other salts and apparatus therefor
Assignee: Spencer Chemical Co
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Filing: 1947-09-19
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Granted: 1950-10-31
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Expires: 1967-09-19
Abstract
No abstract record available.
Inventors
- 👤 William W Yeandle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:59
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/18; B; B01; B01J; B01J2/00; B01J2/02; B01J2/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE PRODUCTION OF GRANULES FROM A MOLTEN LIQUID, THE STEPS OF DROPPING THE MOLTEN MATERIAL IN DROPLET FORM THROUGH A HEATING ZONE FREE FROM COOLING GAS, AND THEN DROPPING THE DROPLETS THROUGH COOLING GAS IN A COOLING ZONE, BENEATH THE HEATING ZONE, COUNTER CURRENT TO AN UPWARDLY DIRECTED DRAFT OF A COOL GAS, WHICH GAS IS WITHDRAWN LATERALLY BEFORE ANY SUBSTANTIAL PORTION THEREOF REACHES THE HEATING ZONE.
Claim 2
Dependent Claim
68 words
IN THE PRODUCTION OF GRANULES FROM A MOLTEN LIQUID, THE STEPS OF DROPPING THE MOLTEN MATERIAL IN DROPLET FORM THROUGH A HEATING ZONE FREE FROM COOLING GAS, AND THEN DROPPING THE DROPLETS THROUGH COOLING GAS IN A COOLING ZONE, BENEATH THE HEATING ZONE, COUNTER CURRENT TO AN UPWARDLY DIRECTED DRAFT OF A COOL GAS, WHICH GAS IS WITHDRAWN LATERALLY BEFORE ANY SUBSTANTIAL PORTION THEREOF REACHES THE HEATING ZONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |