US2903349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer composition containing calcium silicate
Assignee: Columbia Southern Chemical Corp
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Filing: 1955-03-15
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Granted: 1959-09-08
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Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 Louis D Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:23
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/30; C; C05; C05G; C05G3/00; C05G3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A FERTILIZER COMPOSITION PROTECTED AGAINST CAKING IN THE PRESSURE OF MOISTURE COMPRISING IN ADMIXTURE A SOURCE OF PLANT NUTRIENTS IN SUBSTANTIALLY DRY POWDERED FORM HAVING A NORMAL TENDENCY TO CAKE IN THE PRESENCE OF MOISTURE AND, IN THE AMOUNT OF FROM ABOUT 1 TO 13 PERCENT OF THE TOTAL, FINELY-DIVIDED, HYDRATED, PRECIPITATED CALCIUM SILICATE HAVING ABOUT 3.0 TO ABOUT 3.4 MOLES OF SIO2 PER MOL OF CAO AND AN AVERAGE ULTIMATE PARTICLE SIZE IN THE RANGE OF ABOUT 0.01 TO 1 MICRON, SAID CALCIUM SILICATE BEING THE PRODUCT PRECIPIATED IN A VIGOROUSLY AGITATED SOLUTION FROM A SOLUBLE CALCIUM SALT AND ALKALI METAL SILICATE HAVING ABOUT 3.0 TO ABOUT 3.4 MOLES OF SIO2 PER MOLE OF ALKALI METAL, SEPARATED THEREFROM, DRIED AND PULVERIZED, THE CHARACTER AND CONCENTRATION OF SAID CALCIUM SILICATE PROTECTING THE COMPOSITION AGAINST CAKING.
Claim 2
Dependent Claim
135 words
A FERTILIZER COMPOSITION PROTECTED AGAINST CAKING IN THE PRESSURE OF MOISTURE COMPRISING IN ADMIXTURE A SOURCE OF PLANT NUTRIENTS IN SUBSTANTIALLY DRY POWDERED FORM HAVING A NORMAL TENDENCY TO CAKE IN THE PRESENCE OF MOISTURE AND, IN THE AMOUNT OF FROM ABOUT 1 TO 13 PERCENT OF THE TOTAL, FINELY-DIVIDED, HYDRATED, PRECIPITATED CALCIUM SILICATE HAVING ABOUT 3.0 TO ABOUT 3.4 MOLES OF SIO2 PER MOL OF CAO AND AN AVERAGE ULTIMATE PARTICLE SIZE IN THE RANGE OF ABOUT 0.01 TO 1 MICRON, SAID CALCIUM SILICATE BEING THE PRODUCT PRECIPIATED IN A VIGOROUSLY AGITATED SOLUTION FROM A SOLUBLE CALCIUM SALT AND ALKALI METAL SILICATE HAVING ABOUT 3.0 TO ABOUT 3.4 MOLES OF SIO2 PER MOLE OF ALKALI METAL, SEPARATED THEREFROM, DRIED AND PULVERIZED, THE CHARACTER AND CONCENTRATION OF SAID CALCIUM SILICATE PROTECTING THE COMPOSITION AGAINST CAKING.
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |