Patent US3237359A successfully refreshed from Google Patents.
US3237359A
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US
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Spall resistant refractory brick
Assignee: Union Carbide Corp
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Filing: 1962-05-18
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Granted: 1966-03-01
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 Fedia R Charvat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:21
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/063; B; B28; B28B; B28B23/00; C; C04; C04B; C04B35/00; C04B35/66; F23; F23M; F23M5/00; F23M5/06; F27D1/0003; F27D1/0006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |