Patent US2426644A successfully refreshed from Google Patents.
US2426644A
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US
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Furnace construction for fusing refractory materials and the like
Assignee: Saint Gobain Abrasives Inc
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Filing: 1944-08-11
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Granted: 1947-09-02
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Expires: 1964-08-11
Abstract
No abstract record available.
Inventors
- 👤 Pyl Edward Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:04
CPC Classifications
F; F27; F27B; F27B14/00; F27B14/02; F27B3/00; F27B3/06; F27D; F27D3/00; F27D3/15; F27D3/1509; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US990765A
Cited
US1370989A
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US1514268A
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US1671026A
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US1687925A
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US1658071A
Cited
US1712287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |