US3617237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing granular compound fertilizer
Assignee: Mitsui Toatsu Chemicals Inc
•
Filing: 1969-12-23
•
Granted: 1971-11-02
•
Expires: 1989-12-23
Abstract
Abstract Improved process for producing granular compound fertilizer comprising mixing humic substance separated from peat with a mixture of starting fertilizer materials, and granulating by tumbling, kneading or extruding the resulting mixture to form the granular compound fertilizer. The humic substance is obtained by disintegrating peat in water to suspend said humic substance and fibrous substance in the water and separating said humic substance from the suspension.
Inventors
- 👤 Shigeru Nagasawa
- 👤 Tsuneaki Nakano
- 👤 Kunio Sakashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:37
CPC Classifications
C; C10; C10F; C10F7/00; B; B01; B01J; B01J2/00; B01J2/28; C05; C05B; C05B19/00; C05F; C05F11/00; C05F11/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
Process as claimed in claim 1 wherein the amount of said humic substance based on the total dry weight of said mixture and said humic substance is at least about 3 weight percent.
Claim 2
Dependent Claim
34 words
Process as claimed in claim 1 wherein the amount of said humic substance is about 3 to about 30 weight percent based on the total dry weight of said mixture and said humic substance.
Claim 3
Dependent Claim
41 words
Process as claimed in claim 1 wherein said mixture of granulatable fertilizer materials comprises a mixture of at least two materials selected from the class consisting of urea, inorganic nitrogen fertilizer materials, inorganic phosphorus fertilizer materials and inorganic potassium fertilizer materials.
Claim 4
Dependent Claim
24 words
Process as claimed in claim 1 wherein said mixture of granulatable fertilizer materials comprises urea, ammonium sulfate, monoammonium phosphate, calcium superphosphate, and potassium chloride.
Claim 5
Dependent Claim
22 words
Process as claimed in claim 1 wherein said mixture of granulatable fertilizer materials comprises urea, ammonium sulfate, monoammonium phosphate, and potassium sulfate.
Claim 6
Dependent Claim
21 words
Process as claimed in claim 1 wherein said mixture of granulatable fertilizer materials comprises ammonium sulfate, monoammonium phosphate, and potassium sulfate.
Claim 7
Dependent Claim
17 words
Process as claimed in claim 4 wherein said mixture of granulatable fertilizer materials also includes magnesium hydroxide.
Claim 8
Dependent Claim
17 words
Process as claimed in claim 5 wherein said mixture of granulatable fertilizer materials also includes magnesium hydroxide.
Claim 9
Dependent Claim
17 words
Process as claimed in claim 6 wherein said mixture of granulatable fertilizer materials also includes magnesium hydroxide.
References Cited (Backward Citations)
US3307934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |