Patent US20070135733A1 successfully refreshed from Google Patents.
US3311458A
Expired / Lapsed
US
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Copper coated steel
Assignee: Horizons Inc
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Filing: 1963-07-19
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Granted: 1967-03-28
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Expires: 1983-07-19
Abstract
No abstract record available.
Inventors
- 👤 Calvin A Schunemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:04
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/40; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/1266; Y10T428/12667; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A FERROUS ARTICLE HAVING ON ITS SURFACE A TIGHTLY ADHERENT COPPER COATING AT LEAST ABOUT 0.3 MIL AND NOT MORE THAN ABOUT 0.6 MIL IN THICKNESS AND CONTAINING OXYGEN IN AMOUNTS BETWEEN 0.3% AND 0.6% IN THE PORTION OF COATING ADJACENT TO THE COATED SURFACE OF THE FERROUS ARTICLE AND VIRTUALLY NO OXYGEN IN THE OUTER SURFACE PORTION OF THE COATING.
Claim 2
Dependent Claim
61 words
A FERROUS ARTICLE HAVING ON ITS SURFACE A TIGHTLY ADHERENT COPPER COATING AT LEAST ABOUT 0.3 MIL AND NOT MORE THAN ABOUT 0.6 MIL IN THICKNESS AND CONTAINING OXYGEN IN AMOUNTS BETWEEN 0.3% AND 0.6% IN THE PORTION OF COATING ADJACENT TO THE COATED SURFACE OF THE FERROUS ARTICLE AND VIRTUALLY NO OXYGEN IN THE OUTER SURFACE PORTION OF THE COATING.
References Cited (Backward Citations)
US2036667A
Cited
US2514873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |