Patent US2728695A successfully refreshed from Google Patents.
US2728695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming corrosion resistant coating on metallic surfaces with ferrate solutions
Assignee: EIDP Inc
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Filing: 1954-09-21
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Granted: 1955-12-27
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Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Harrison John Rufford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:35
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF PROTECTING A FERROUS METAL SUCH AS CAST IRON, STEEL OR THE LIKE AGAINST CORROSION WHICH COMPRISES CONTACTING SAID METAL SUCCESSIVELY WITH A FIRST SOLUTION CONTAINING A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL THIOCYANATES AND 8-HYDROXYQUINOLINE AND THEN WITH A SECOND SOLUTION CONTAINING AN ALKALI METAL FERRATE.
Claim 2
Independent Claim
56 words
THE METHOD OF PROTECTING A FERROUS METAL SUCH AS CAST IRON, STEEL OR THE LIKE AGAINST CORROSION WHICH COMPRISES CONTACTING SAID METAL SUCCESSIVELY WITH A FIRST SOLUTION CONTAINING A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL THIOCYANATES AND 8-HYDROXYQUINOLINE AND THEN WITH A SECOND SOLUTION CONTAINING AN ALKALI METAL FERRATE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |