Patent US3012874A successfully refreshed from Google Patents.
US3012874A
Expired / Lapsed
US
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Granulation of calcium metaphosphate
Assignee: Tennessee Valley Authority
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Filing: 1959-06-03
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Granted: 1961-12-12
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Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Alvin B Phillips
- 👤 Ronald D Young
- 👤 Earl H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:16
CPC Classifications
C; C05; C05B; C05B19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR GRANULATING CALCIUM METAPHOSPHATE WHICH CONSISTS OF INTRODUCING VITREOUS CALCIUM METAPHOSPHATE IN PARTICLES OF SUCH SIZE THAT SUBSTANTIALLY ALL WILL PASS A STANDARD 14-MESH SCREEN AND ABOUT 40 PERCENT WILL PASS A 100-MESH SCREEN AND AT A TEMPERATURE IN THE RANGE FROM 180* TO 225*F. INTO A ROTATING DRUM, MOISTENING THE PARTICLES OF CALCIUM METAPHOSPHATE WITH A LIQUID CONSISTING OF HOT WATER, MAINTAINING A TEMPERATURE IN THE RANGE FROM ABOUT 180* TO 225*F. IN THE DRUM, AND WITHDRAWING A GRANULAR FERTILIZER PRODUCT CONSISTING ESSENTIALLY OF GRANULES CONTAINING AGGLOMERATED VITREOUS CALCIUM METAPHOSPHATE PARTICLES HELD TOGETHER IN A MATRIX OF HYDRATED POLYMERS OF CALCIUM METAPHOSPHATE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR GRANULATING CALCIUM METAPHOSPHATE WHICH CONSISTS OF INTRODUCING VITREOUS CALCIUM METAPHOSPHATE IN PARTICLES OF SUCH SIZE THAT SUBSTANTIALLY ALL WILL PASS A STANDARD 14-MESH SCREEN AND ABOUT 40 PERCENT WILL PASS A 100-MESH SCREEN AND AT A TEMPERATURE IN THE RANGE FROM 180* TO 225*F. INTO A ROTATING DRUM, MOISTENING THE PARTICLES OF CALCIUM METAPHOSPHATE WITH A LIQUID CONSISTING OF HOT WATER, MAINTAINING A TEMPERATURE IN THE RANGE FROM ABOUT 180* TO 225*F. IN THE DRUM, AND WITHDRAWING A GRANULAR FERTILIZER PRODUCT CONSISTING ESSENTIALLY OF GRANULES CONTAINING AGGLOMERATED VITREOUS CALCIUM METAPHOSPHATE PARTICLES HELD TOGETHER IN A MATRIX OF HYDRATED POLYMERS OF CALCIUM METAPHOSPHATE.
References Cited (Backward Citations)
US2837418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |