US3759197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the agglomeration of particulate materials
Assignee: Individual
•
Filing: 1971-09-22
•
Granted: 1973-09-18
•
Expires: 1991-09-22
Abstract
Abstract A process for the agglomeration of particulate material comprising contacting said particulate material with an aqueous solution of polymer of acrylamide and an aqueous solution of dialdehyde having the formula O CH - (R)n - CH O, where R is a divalent hydrocarbon radical having from 1 to 8 carbon atoms, and n is 0 or 1, at a temperature in the range from 0* to 100*C.
Inventors
- 👤 W Bracke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:29
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/24; Y; Y10; Y10S; Y10S111/00; Y10S111/90; Y10S47/00; Y10S47/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
The process of claim 1 wherein the polymer of acrylamide has a molecular weight higher than 5,000.
Claim 2
Dependent Claim
19 words
The process of claim 2 wherein the polymer of acrylamide has a molecular weight of between 50,000 and 1,500,000.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the dialdehyde is an aliphatic dialdehyde.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the aldehyde is glyoxal.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein said dialdehyde is employed in an amount not exceeding one aldehyde group per one amide group of the polymer of acrylamide.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said particulate material is particles of soil.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein the concentration of the polymer of acrylamide in said aqueous solution is between about 1 and about 4 percent by weight.
Claim 8
Dependent Claim
33 words
The process of claim 7 wherein said polymer of acrylamide is applied to the surface of said soil in an amount of from about 5 to 500 grams per square meter of soil.
Claim 9
Dependent Claim
21 words
The process of claim 7 further comprising dispersing seeds into either said solution of acrylamide polymer or said solution of dialdehyde.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |