US4101328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
White rust inhibitor
Assignee: A F IND Inc
•
Filing: 1976-07-09
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Granted: 1978-07-18
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Expires: 1996-07-09
Abstract
Abstract A white rust inhibited composition is comprised of a zinc containing substrate. A white rust inhibiting composition contacts the substrate and is comprised of a vapor corrosion inhibitor and a pH adjusting compound to adjust and maintain the pH of the white rust inhibiting composition between 8 and 12.5.
Inventors
- 👤 Arthur H. Fieser
- 👤 Donald C. Finney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/143; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
In a combination including a zinc surfaced steel substrate susceptible to white rust and an amine-acid salt corrosion inhibiting composition in contact with the substrate, the improvement comprising: an effective amount of a pH adjusting amine, having a pK of less than 5, to adjust the effective pH of said corrosion inhibiting composition at 8 to 12.5
Claim 2
Dependent Claim
57 words
In a combination including a zinc surfaced steel substrate susceptible to white rust and an amine-acid salt corrosion inhibiting composition in contact with the substrate, the improvement comprising: an effective amount of a pH adjusting amine, having a pK of less than 5, to adjust the effective pH of said corrosion inhibiting composition at 8 to 12.5
Claim 3
Dependent Claim
17 words
The combination of claim 1 wherein said pH adjusting amine has a pK of less than 4.
Claim 4
Dependent Claim
13 words
The combination of claim 1 wherein said pH adjusting amine is cyclohexyl amine.
Claim 5
Dependent Claim
18 words
The combination of claim 1 wherein the effective pH of said corrosion inhibiting composition is 10 to 12.5.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |