Patent US3149956A successfully refreshed from Google Patents.
US3149956A
Expired / Lapsed
US
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Preparation of granular nitrogenous fertilizer
Assignee: Armour and Co
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Filing: 1961-08-03
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Granted: 1964-09-22
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Expires: 1981-08-03
Abstract
No abstract record available.
Inventors
- 👤 James E Seymour
- 👤 White Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:45
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A PROCESS FOR PREPARING A NITROGENOUS FERTILIZER PRODUCT, THE STEP OF REACING IN THE ABSECNE OF EXTERNAL HEAT AN AQUEOUS NITROGENEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE LIQUOR, UREA LIQUOR, NON-POLYMERIZED UREA-FORMALDEHYDE LIQUOR, AND COMBINATIONS THEREOF, WITH SUFFICIENT FRESHLY CALCINED CALCIUM SULFATE TO CHEMICALLY ABSORB THE FREE WATER OF CRYSTALLIZATION AND REDUCE THE GRANULATED PRODUCT SUBSTANTIALLY TO DRYNESS.
Claim 2
Dependent Claim
62 words
IN A PROCESS FOR PREPARING A NITROGENOUS FERTILIZER PRODUCT, THE STEP OF REACING IN THE ABSECNE OF EXTERNAL HEAT AN AQUEOUS NITROGENEOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF AMMONIUM NITRATE LIQUOR, UREA LIQUOR, NON-POLYMERIZED UREA-FORMALDEHYDE LIQUOR, AND COMBINATIONS THEREOF, WITH SUFFICIENT FRESHLY CALCINED CALCIUM SULFATE TO CHEMICALLY ABSORB THE FREE WATER OF CRYSTALLIZATION AND REDUCE THE GRANULATED PRODUCT SUBSTANTIALLY TO DRYNESS.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |