Patent US2937149A successfully refreshed from Google Patents.
US2937149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for the removal of corrosion from metal surfaces
Assignee: E & A West Ltd
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Filing: 1957-08-08
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Granted: 1960-05-17
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Hilton Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:34
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A COMPOSITION FOR THE REMOVAL OF CORROSION FROM METAL SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING 25% TO 35% OF PHOSPHORIC ACID MIXED WITH 50% TO 55% BY WEIGHT OF THE FINE WET-GROUND MICA TOGETHER WITH A WETTING AGENT.
Claim 2
Dependent Claim
38 words
A COMPOSITION FOR THE REMOVAL OF CORROSION FROM METAL SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING 25% TO 35% OF PHOSPHORIC ACID MIXED WITH 50% TO 55% BY WEIGHT OF THE FINE WET-GROUND MICA TOGETHER WITH A WETTING AGENT.
References Cited (Backward Citations)
US2362284A
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US2393866A
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US2735818A
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US1428084A
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US1729767A
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US1943253A
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US2220451A
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US2672449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |