US2990293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating and rustproofing metal articles
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1956-01-13
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Granted: 1961-06-27
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry A Toulmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:21
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/082; C23C24/085; C23C24/087; C23C4/00; C23C4/02; C23C4/04; C23C4/06; C23C4/08; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12451; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF TREATING METAL ARTICLES TO RENDER THE SURFACE THEREOF RESISTANT TO CORROSION WITHOUT ANY APPRECIABLE CHANGE IN THE DIMENSIONS OF THE ARTICLE, SAID METHOD CONSISTING OF THE STEPS OF (A) HEATING THE METAL ARTICLE TO A TIMPERATURE BETWEEN 500 AND 1500*F. AND BELOW THE TEMPERATURE AT WHICH SAID METAL ARTICLE WILL MELT AND HIGH ENOUGH TO OPEN THE PORES PROVIDING A MICROPOROUS METAL SURFACE, (B) THEREAFTER BOMBARDING THE RESULTANT HEATED MICROPOROUS METAL SURFACE WITH METAL PARTICLES CONSISTING OF A CORROSION-RESISTANT METAL, SAID METAL PARTICLES BEING SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND ZINC, SAID METAL PARTICLES BEING OF A DIAMETER BETWEEN 0.5 AND 3.0 MICRONS, AND (C) COOLING THE METAL ARTICLE THUS TREATED TO PROVIDE A METAL ARTICLE HAVING ENHANCED RESISTANCE TO SURFACE CORROSION.
Claim 2
Independent Claim
128 words
A METHOD OF TREATING METAL ARTICLES TO RENDER THE SURFACE THEREOF RESISTANT TO CORROSION WITHOUT ANY APPRECIABLE CHANGE IN THE DIMENSIONS OF THE ARTICLE, SAID METHOD CONSISTING OF THE STEPS OF (A) HEATING THE METAL ARTICLE TO A TIMPERATURE BETWEEN 500 AND 1500*F. AND BELOW THE TEMPERATURE AT WHICH SAID METAL ARTICLE WILL MELT AND HIGH ENOUGH TO OPEN THE PORES PROVIDING A MICROPOROUS METAL SURFACE, (B) THEREAFTER BOMBARDING THE RESULTANT HEATED MICROPOROUS METAL SURFACE WITH METAL PARTICLES CONSISTING OF A CORROSION-RESISTANT METAL, SAID METAL PARTICLES BEING SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, TITANIUM AND ZINC, SAID METAL PARTICLES BEING OF A DIAMETER BETWEEN 0.5 AND 3.0 MICRONS, AND (C) COOLING THE METAL ARTICLE THUS TREATED TO PROVIDE A METAL ARTICLE HAVING ENHANCED RESISTANCE TO SURFACE CORROSION.
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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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |