US4093566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate-free spray cleaner for metals
Assignee: United States Department of the Army
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Filing: 1976-12-27
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Granted: 1978-06-06
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Expires: 1996-12-27
Abstract
Abstract Spray cleaner formulations useful in the surface treatment of metallic ammunition components and the like and comprising sodium metasilicate, sodium carbonate, and either sodium hydroxide or ethylenediamine tetraacetic acid, the cleaner formulation being completely devoid of phosphates such that the spent cleaning formulation, when discharged into waterways, will not promote algae growth therein or eutrophication thereof.
Inventors
- 👤 Elizabeth L. MacNamara
- 👤 Fred Pearlstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:25
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/044; C11D3/08; C11D3/10; C11D3/16; C11D3/26; C11D3/33
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 50% by weight sodium metasilicate, about 40% by weight sodium carbonate, and about 10% by weight ethylenediamine tetraacetic acid disodium salt.
Claim 2
Dependent Claim
33 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 50% by weight sodium metasilicate, about 40% by weight sodium carbonate, and about 10% by weight ethylenediamine tetraacetic acid disodium salt.
Claim 3
Dependent Claim
33 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 10 parts of the composition of claim 1 and about 0.5 parts of a wetting agent in 1000 parts of water.
Claim 4
Dependent Claim
15 words
The composition of claim 2, wherein the wetting agent is a polyethoxylated straight chain alcohol.
Claim 5
Dependent Claim
30 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 50% by weight sodium metasilicate, about 20% by weight sodium carbonate, and about 30% by weight sodium hydroxide.
Claim 6
Dependent Claim
30 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 50% by weight sodium metasilicate, about 20% by weight sodium carbonate, and about 30% by weight sodium hydroxide.
Claim 7
Dependent Claim
33 words
A metal cleaner composition essentially free from phosphates, consisting essentially of about 10 parts of the composition of claim 4 and about 0.5 parts of a wetting agent in 1000 parts of water.
Claim 8
Dependent Claim
15 words
The composition of claim 5, wherein the wetting agent is a polyethoxylated straight chain alcohol.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |