Patent US2697670A successfully refreshed from Google Patents.
US2697670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic coated chromium steel
Assignee: BBC Brown Boveri AG Germany
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Filing: 1953-07-20
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Granted: 1954-12-21
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Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Gaudenzi Arthur
- 👤 Giger Hannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:23
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/007; C; C03; C03C; C03C8/00; C04; C04B; C04B35/00; C04B35/66; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C23; C23D; C23D3/00; C23D5/00; F01D5/00; F01D5/12; F01D5/28; F01D5/284; F02; F02C; F02C7/00; F02C7/30; F16; F16J; F16J9/00; F16J9/26; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S205/00; Y10S205/917; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN ARTICLE COMPRISING A METALLIC OBJECT FORMED OF AN ALLOY CONSISTING ESSENTIALLY OF IRON AND FROM ABOUT 14% TO ABOUT 30% OF CHROMIUM, AND A CERAMIC COATING ON SAID OBJECT SAID COATING COMPRISING A FIRST LAYER IN CONTACT WITH SAID OBJECT OF CERAMIC ENAMEL SUBSTANTIALLY FREE OF MAGNESIUM OXIDE AND CONTAINING FROM ABOUT 2% TO ABOUT 12% OF CHROMIUM OXIDE AND AT LEAST ONE LAYER OF CERAMIC ENAMEL SUPERPOSED UPON SAID FIRST LAYER, SAID SUPERPOSED LAYER CONTAINING AT LEAST ABOUT 10% OF MAGNESIUM OXIDE.
Claim 2
Dependent Claim
84 words
AN ARTICLE COMPRISING A METALLIC OBJECT FORMED OF AN ALLOY CONSISTING ESSENTIALLY OF IRON AND FROM ABOUT 14% TO ABOUT 30% OF CHROMIUM, AND A CERAMIC COATING ON SAID OBJECT SAID COATING COMPRISING A FIRST LAYER IN CONTACT WITH SAID OBJECT OF CERAMIC ENAMEL SUBSTANTIALLY FREE OF MAGNESIUM OXIDE AND CONTAINING FROM ABOUT 2% TO ABOUT 12% OF CHROMIUM OXIDE AND AT LEAST ONE LAYER OF CERAMIC ENAMEL SUPERPOSED UPON SAID FIRST LAYER, SAID SUPERPOSED LAYER CONTAINING AT LEAST ABOUT 10% OF MAGNESIUM OXIDE.
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) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |