Patent US2156608A successfully refreshed from Google Patents.
US2156608A
Expired / Lapsed
US
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Refractory and method of making same
Assignee: Crown Cork and Seal Co Inc
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Filing: 1937-03-25
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Granted: 1939-05-02
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Expires: 1957-03-25
Abstract
No abstract record available.
Inventors
- 👤 Schon Matthew
- 👤 Ment Harold C Be
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27B; F27B3/00; F27B3/10; F27B3/12; F27B2003/125; F27D99/00; F27D99/0001; F27D99/0006; F27D2099/0021; F27D2099/0058
Claims Analysis
Total Claims: 0
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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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |