US2798801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pelletized nitrogenous fertilizers
Assignee: SMITH DOUGLASS CO Inc
•
Filing: 1953-12-30
•
Granted: 1957-07-09
•
Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 Kieffer Dale Clarke
- 👤 Powers Herman Goldsborough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
C; C05; C05C; C05C1/00; C05C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR CONTINUOUSLY PRODUCING PELLETS OF A FERTILIZER COMPOSISTION CONTAINING A HYGROSCOPIC NITROGENOUS SALT, WHICH COMPRISES FORMING AT AN ELEVATED TEMPERATURE A LIQUID DISPERSION OF SAID COMPOSITION HAVING AS ITS BASE AN AQUEOUS SOLUTION OF SAID SALT SO CONCENTRATED THAT IS CRYSTALLIZES AT ROOM TEMPERATURE, CONTINUOUSLY MIXING AND TUMBLING WITH A STREAM OF SAID LIQUID DISPERSION A MASS AT LEAST SEVERAL TIMES GREATER, BY WEIGHT, OF PREFORMED DRIED GRANULES OF SAID COMPOSITION, SAID GRANULES CONSISTING PREDOMINANTLY OF PELLETS IN THE SIZE RANGE OF THE DESIRED PRODUCT, THUS FORMING COATINGS OF SAID DISPERSION ON SAID GRANULES AND IMMEDIATELY SOLIDIFYING SAID COATINGS THEREON, THEN CONTINUOUSLY DRYING THE COATED GRANULES.
Claim 2
Dependent Claim
108 words
A PROCESS FOR CONTINUOUSLY PRODUCING PELLETS OF A FERTILIZER COMPOSISTION CONTAINING A HYGROSCOPIC NITROGENOUS SALT, WHICH COMPRISES FORMING AT AN ELEVATED TEMPERATURE A LIQUID DISPERSION OF SAID COMPOSITION HAVING AS ITS BASE AN AQUEOUS SOLUTION OF SAID SALT SO CONCENTRATED THAT IS CRYSTALLIZES AT ROOM TEMPERATURE, CONTINUOUSLY MIXING AND TUMBLING WITH A STREAM OF SAID LIQUID DISPERSION A MASS AT LEAST SEVERAL TIMES GREATER, BY WEIGHT, OF PREFORMED DRIED GRANULES OF SAID COMPOSITION, SAID GRANULES CONSISTING PREDOMINANTLY OF PELLETS IN THE SIZE RANGE OF THE DESIRED PRODUCT, THUS FORMING COATINGS OF SAID DISPERSION ON SAID GRANULES AND IMMEDIATELY SOLIDIFYING SAID COATINGS THEREON, THEN CONTINUOUSLY DRYING THE COATED GRANULES.
References Cited (Backward Citations)
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US2164986A
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US2287759A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |