US3713800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing garbage based fertilizer
Assignee: Individual
•
Filing: 1971-05-24
•
Granted: 1973-01-30
•
Expires: 1991-05-24
Abstract
Abstract A fertilizer is made by adding dry fertilizer chemicals, including urea, to dry composted organic waste materials, following which a mixture of prepolymer of urea and formaldehyde suspended in an excess of formaldehyde is added and then phosphoric acid or other mineral acid is added in order to produce the fertilizer product.
Inventors
- 👤 J Karnemaat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
C; C05; C05C; C05C9/00; C05C9/005; C05C9/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
50 words
heating composted garbage from municipal garbage treatment plants to a temperature of at least about 250* F. and below the charring temperature of said composted garbage and removing water and volatilized fat therefrom to reduce the water content thereof to not substantially in excess of about 3 percent by weight;
Claim 2
Dependent Claim
50 words
heating composted garbage from municipal garbage treatment plants to a temperature of at least about 250* F. and below the charring temperature of said composted garbage and removing water and volatilized fat therefrom to reduce the water content thereof to not substantially in excess of about 3 percent by weight;
Claim 3
Dependent Claim
18 words
In a process for producing a granular, relatively dust-free fertilizer having slow nitrogen release characteristics, the steps comprising:
Claim 4
Dependent Claim
18 words
In a process for producing a granular, relatively dust-free fertilizer having slow nitrogen release characteristics, the steps comprising:
Claim 5
Dependent Claim
25 words
A process according to claim 1, in which in step (3) particles of phosphorus-supplying material and potassium-supplying material are admixed with said dried composted garbage.
Claim 6
Dependent Claim
30 words
then subdividing the dried composted garbage to form same into small particles so that at least about 80 percent by weight of the particles pass through a 20 mesh screen;
Claim 7
Dependent Claim
30 words
then subdividing the dried composted garbage to form same into small particles so that at least about 80 percent by weight of the particles pass through a 20 mesh screen;
Claim 8
Dependent Claim
44 words
then admixing urea particles with said dried composted garbage particles and blending same in order to make a dry mixture which is substantially uniform as to chemical content and particle size, said mixture containing composted garbage particles as the sole organic carrier material therein;
Claim 9
Dependent Claim
44 words
then admixing urea particles with said dried composted garbage particles and blending same in order to make a dry mixture which is substantially uniform as to chemical content and particle size, said mixture containing composted garbage particles as the sole organic carrier material therein;
Claim 10
Dependent Claim
21 words
A process according to claim 1, in which the mol ratio of urea to formaldehyde in said solution is from 1-1.5:1.
Claim 11
Dependent Claim
12 words
separately providing an aqueous solution containing a urea-formaldehyde prepolymer and excess formaldehyde;
Claim 12
Dependent Claim
12 words
separately providing an aqueous solution containing a urea-formaldehyde prepolymer and excess formaldehyde;
Claim 13
Dependent Claim
14 words
A process according to claim 1, in which the mineral acid is phosphoric acid.
Claim 14
Dependent Claim
47 words
A process according to claim 1, in which the relative amounts of the urea added to (1) said dried composted garbage and (2) said formaldehyde solution are adjusted in order to obtain a fertilizer product having selectively variable amounts of readily available nitrogen and slowly available nitrogen.
Claim 15
Dependent Claim
33 words
then adding the aqueous solution of prepolymer and formaldehyde to said dry mixture and vigorously mixing the solution and mixture together to form a damp mass which is uniform as to chemical content;
Claim 16
Dependent Claim
33 words
then adding the aqueous solution of prepolymer and formaldehyde to said dry mixture and vigorously mixing the solution and mixture together to form a damp mass which is uniform as to chemical content;
Claim 17
Dependent Claim
11 words
then removing water from the slurry to obtain the fertilizer product.
Claim 18
Dependent Claim
11 words
then removing water from the slurry to obtain the fertilizer product.
References Cited (Backward Citations)
US3076700A
Cited
US3006753A
Cited
US3073693A
Cited
US3142557A
Cited
US3220824A
Cited
US3333940A
Cited
US3451799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |