US3240633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming phosphate coating on zinc
Assignee: Hooker Chemical Corp
•
Filing: 1962-06-04
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Granted: 1966-03-15
•
Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Gowman Lawrence Paul
- 👤 James I Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:33
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/34; C23C22/36; C23C22/362; C23C22/364
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD FOR COATING ZINC COMPRISING THE STEP OF TREATING THE SURFACE WITH AN AQUEOUS SOLUTION CONTAINING AS ITS ESSENTIAL COATING PRODUCING INGREDIENTS ABOUT 0.5% TO ABOUT 4.0 PHOSPHATE ION, AN IRON OF THE GROUP CONSISTING OF THE ZINC ION AND MANGANESE ION INA PROPORTION AT LEAST SUFFICIENT TO FORM DIHYDROGEN PHOSPHATE WITH ALL SAID PHOSPHATE ION, ABOUT 0.01 TO ABOUT 1% OF AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF THE COBALT ION AND THE NICKEL ION, ABOUT 0.03% TO ABOUT 1% OF THE FLUORIDE ION BUT NOT MORE THAN 0.5% BEING PRESENT AS SIMPLE FLUORIDE ION, SAID FLUORIDE ION BEING ADDED AS A MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROFLUORIC ACID, FLUOBORATE AND SILICOFLUORIDE, AND AT LEAST ABOUT 0.0015% OF THE FERRIC ION.
Claim 2
Independent Claim
128 words
A METHOD FOR COATING ZINC COMPRISING THE STEP OF TREATING THE SURFACE WITH AN AQUEOUS SOLUTION CONTAINING AS ITS ESSENTIAL COATING PRODUCING INGREDIENTS ABOUT 0.5% TO ABOUT 4.0 PHOSPHATE ION, AN IRON OF THE GROUP CONSISTING OF THE ZINC ION AND MANGANESE ION INA PROPORTION AT LEAST SUFFICIENT TO FORM DIHYDROGEN PHOSPHATE WITH ALL SAID PHOSPHATE ION, ABOUT 0.01 TO ABOUT 1% OF AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF THE COBALT ION AND THE NICKEL ION, ABOUT 0.03% TO ABOUT 1% OF THE FLUORIDE ION BUT NOT MORE THAN 0.5% BEING PRESENT AS SIMPLE FLUORIDE ION, SAID FLUORIDE ION BEING ADDED AS A MATERIAL SELECTED FROM THE GROUP CONSISTING OF HYDROFLUORIC ACID, FLUOBORATE AND SILICOFLUORIDE, AND AT LEAST ABOUT 0.0015% OF THE FERRIC ION.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |