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US3203835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorate accelerated zinc phosphating baths with added arsenate
Assignee: Pennwalt Corp
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Filing: 1962-10-25
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Granted: 1965-08-31
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Expires: 1982-10-25
Abstract
No abstract record available.
Inventors
- 👤 William A Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:27
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12; C23C22/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE AQUEOUS ZINC PHOSPHATING SOLUTION FOR COATING STEEL COMPRISING AT LEAST 0.5 GRAM PER LITER OF ZINC IONS, AT LEAST 2 GRAMS PER LITER OF PHOSPHATE IONS, AT LEAST 0.5 GRAM PER LITER OF CHLORATE IONS AND AT LEAST 0.01 GRAM PER LITER OF ARSENATE IONS.
Claim 2
Dependent Claim
46 words
THE AQUEOUS ZINC PHOSPHATING SOLUTION FOR COATING STEEL COMPRISING AT LEAST 0.5 GRAM PER LITER OF ZINC IONS, AT LEAST 2 GRAMS PER LITER OF PHOSPHATE IONS, AT LEAST 0.5 GRAM PER LITER OF CHLORATE IONS AND AT LEAST 0.01 GRAM PER LITER OF ARSENATE IONS.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |