Patent US5315384A successfully refreshed from Google Patents.
US3268367A
Expired / Lapsed
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Corrosion resistant phosphate coating and method for producing same
Assignee: Hooker Chemical Corp
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Filing: 1962-11-13
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Granted: 1966-08-23
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Henry J Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:28
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/17; H; H01; H01Q; H01Q3/00; H01Q3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR FORMING ZINC PHOSPHATE COATINGS ON FERROUS SURFACES WHICH COMPRISES THE STEPS OF IMMERSNG THE SURFACE IN A SOLUTION CONSISTING ESSENTIALLY OF 0.1%-2% ZINC, 0.8%-4% PO4, 0.1%-1% IRON, AND FROM ABOUT 0.125% TO ABOUT 2% OF AT LEAST ONE SATURATED, ALIPHATIC POLYCARBOXYLIC ACID HAVING 2-6 CARBON ATOMS, THE CARBON ATOM ADJACENT TO AT LEAST ONE CARBOXY GROUP THEREIN BEING SUBSTITUTED WITH A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROXY, AMINO AND CARBOXY RADICALS, AND MAINTAINING SAID SURFACE IN SAID SOLUTION UNTIL A CORROSION RESISTANT COATING IS FORMED ON SAID SURFACE.
Claim 2
Independent Claim
93 words
A METHOD FOR FORMING ZINC PHOSPHATE COATINGS ON FERROUS SURFACES WHICH COMPRISES THE STEPS OF IMMERSNG THE SURFACE IN A SOLUTION CONSISTING ESSENTIALLY OF 0.1%-2% ZINC, 0.8%-4% PO4, 0.1%-1% IRON, AND FROM ABOUT 0.125% TO ABOUT 2% OF AT LEAST ONE SATURATED, ALIPHATIC POLYCARBOXYLIC ACID HAVING 2-6 CARBON ATOMS, THE CARBON ATOM ADJACENT TO AT LEAST ONE CARBOXY GROUP THEREIN BEING SUBSTITUTED WITH A RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROXY, AMINO AND CARBOXY RADICALS, AND MAINTAINING SAID SURFACE IN SAID SOLUTION UNTIL A CORROSION RESISTANT COATING IS FORMED ON SAID SURFACE.
References Cited (Backward Citations)
US1493012A
Cited
GB738004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |