US3328303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for protecting galvanized iron against attack by strong acids
Assignee: Roche Diagnostics GmbH
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Filing: 1964-07-23
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Granted: 1967-06-27
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Expires: 1984-07-23
Abstract
No abstract record available.
Inventors
- 👤 Mahnkopf Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:08
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE PROCESS FOR PROTECTING GALVANIZED IRON FROM ATTACK OF STRONG ACIDS BY INCORPORATING 0.05 TO 2% OF QUINOIDINE IN SAID ACID PRIOR TO THE APPLICATION THEREOF TO THE GALVANIZED IRON, THE IMPROVEMENT OF ADDITIONALLY INCORPORATING IN SAID ACID 0.05-2% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ACRIDINE, PHENANTHRIDINE, 7,8BENZOQUINOLINE, 2-PHENYLQUINOLINE AND 9-PHENYLARIDINE.
Claim 2
Dependent Claim
55 words
IN THE PROCESS FOR PROTECTING GALVANIZED IRON FROM ATTACK OF STRONG ACIDS BY INCORPORATING 0.05 TO 2% OF QUINOIDINE IN SAID ACID PRIOR TO THE APPLICATION THEREOF TO THE GALVANIZED IRON, THE IMPROVEMENT OF ADDITIONALLY INCORPORATING IN SAID ACID 0.05-2% OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ACRIDINE, PHENANTHRIDINE, 7,8BENZOQUINOLINE, 2-PHENYLQUINOLINE AND 9-PHENYLARIDINE.
References Cited (Backward Citations)
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Cited
US2167621A
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US2499283A
Cited
US2694001A
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US2965577A
Cited
US3135632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |