Patent US3781177A successfully refreshed from Google Patents.
US3781177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isostearic acid coated,non-dusting aluminum particles
Assignee: Alcoa Corp
•
Filing: 1973-04-26
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Granted: 1973-12-25
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Expires: 1993-04-26
Abstract
Abstract Aluminum powder coated with isostearic acid exhibits substantially no dusting during handling thereby enhancing safety and environmental aspects.
Inventors
- 👤 T Kondis
- 👤 R Rolles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:35
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14; B; B22; B22F; B22F1/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
The product according to claim 1 wherein said particulate aluminum consists of an atomized grade of aluminum.
Claim 2
Dependent Claim
28 words
Particulate aluminum in bulk according to claim 1 and consisting in part of particles capable of passing through a 325 mesh screen, and characterized by being substantially non-dusting.
Claim 3
Dependent Claim
48 words
The product according to claim 3 wherein said particulate aluminum consists of 10 to 100 percent of aluminum particles capable of passing through a 325 mesh screen, said particles being coated with between 0.2 to 5 percent of isostearic acid based on the weight of said aluminum particulates.
Claim 4
Dependent Claim
17 words
The product according to claim 3 wherein said particulate aLuminum consists of an atomized grade of aluminum.
Claim 5
Dependent Claim
19 words
The product according to claim 3 wherein at least 90 percent of the total aluminum surface area is coated.
Claim 6
Independent Claim
35 words
A method for substantially reducing the dusting of particulate aluminum in bulk which comprises coating said particulate aluminum with between 0.1 to 5 percent of isostearic acid based on the weight of said aluminum particulates.
Claim 7
Independent Claim
62 words
A method for substantially reducing the dusting of particulate aluminum in bulk comprising aluminum particles capable of passing through a 325 mesh sieve, which comprises blending said particulate aluminum at room temperature with between 0.1 to 5 percent of isostearic acid based on the weight of said aluminum particulates, thereby to apply to surfaces of said particulates coatings of said isostearic acid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |