Patent US2874067A successfully refreshed from Google Patents.
US2874067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory article and method of making the same
Assignee: US Philips Corp
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Filing: 1956-11-19
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Granted: 1959-02-17
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Expires: 1976-11-19
Abstract
No abstract record available.
Inventors
- 👤 Sommer Alfred
- 👤 Lynn J Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/66
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
A REFRACTORY ARTICLE COMPRISING A BASE OF CRYSTALLINE SILICON CARBIDE, A COATING ON SAID BODY CONSISTING ESSENTIALLY OF IRON, AND A LAYER OF ALUMINUM OXIDE BETWEEN SAID COATING AND SAID BODY.
References Cited (Backward Citations)
US1466213A
Cited
US2406909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |