Patent US3127249A successfully refreshed from Google Patents.
US3127249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonium nitrate
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:02
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR DRYING AMMONIUM NITRATE PEBBLES PRODUCED BY SPRAYING MOLTEN AQUEOUS AMMONIUM NITRATE CONTAINING BETWEEN ABOUT 3% AND ABOUT 6% OF WATER INTO THE TOP OF AN ELONGATED VERTICAL PEBBLING TOWER, THEREBY FORMING DROPLETS OF AMMONIUM NITRATE, THE STEPS WHICH COMPRISE, (1) COOLING SAID DROPLETS WITHOUT SUBSTANTIAL DRYING THEREOF, TO TEMPERAURES WITHIN THE RANGE BETWEEN ABOUT 60*C. AND ABOUT 84*C., WHEREBY SOLID AMMONIUM NITRATE PEBBLES ARE PRODUCED, (2) MAINTAINING SAID PEBBLES UNDER NON-DRYING CONDITIONS AT TEMPERATURES BETWEEN ABOUT 60*C. AND ABOUT 84*C. FOR A PERIOD SUFFICIENT TO CONVERT SUBSTANTIALLY ALL THE AMMONIUM NITRATE OF THE PEBBLES TO FORM III, (3) CONTACTING SAID PEBBLES IN A DRIER WITH A COUNTERCURRENT STREAM OF INERT GAS ENTERING AT TEMPERATURES BETWEEN ABOUT 120*C. AND ABOUT 150* C., FOR A PERIOD SUFFICIENT TO REDUCE THE WATER CONTENT OF THE PEBBLES TO NOT MORE THAN ABOUT 0.3%.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR DRYING AMMONIUM NITRATE PEBBLES PRODUCED BY SPRAYING MOLTEN AQUEOUS AMMONIUM NITRATE CONTAINING BETWEEN ABOUT 3% AND ABOUT 6% OF WATER INTO THE TOP OF AN ELONGATED VERTICAL PEBBLING TOWER, THEREBY FORMING DROPLETS OF AMMONIUM NITRATE, THE STEPS WHICH COMPRISE, (1) COOLING SAID DROPLETS WITHOUT SUBSTANTIAL DRYING THEREOF, TO TEMPERAURES WITHIN THE RANGE BETWEEN ABOUT 60*C. AND ABOUT 84*C., WHEREBY SOLID AMMONIUM NITRATE PEBBLES ARE PRODUCED, (2) MAINTAINING SAID PEBBLES UNDER NON-DRYING CONDITIONS AT TEMPERATURES BETWEEN ABOUT 60*C. AND ABOUT 84*C. FOR A PERIOD SUFFICIENT TO CONVERT SUBSTANTIALLY ALL THE AMMONIUM NITRATE OF THE PEBBLES TO FORM III, (3) CONTACTING SAID PEBBLES IN A DRIER WITH A COUNTERCURRENT STREAM OF INERT GAS ENTERING AT TEMPERATURES BETWEEN ABOUT 120*C. AND ABOUT 150* C., FOR A PERIOD SUFFICIENT TO REDUCE THE WATER CONTENT OF THE PEBBLES TO NOT MORE THAN ABOUT 0.3%.
References Cited (Backward Citations)
US2402192A
Cited
US2782108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |