Patent US2647062A successfully refreshed from Google Patents.
US2647062A
Expired / Lapsed
US
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Method of making refractory masses and batch
Assignee: Canadian Refractories Ltd
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Filing: 1950-04-07
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Granted: 1953-07-28
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Expires: 1970-04-07
Abstract
No abstract record available.
Inventors
- 👤 Frank E Lathe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1483469A
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US1206771A
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US1160085A
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US1210431A
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US1300631A
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US1751234A
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US2015446A
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US2113818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |