US2489602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for handling and processing molten refractory materials
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1944-08-11
•
Granted: 1949-11-29
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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
2026-10-27 17:21
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US620020A
Cited
US260388A
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US347784A
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US478792A
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US495843A
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US601083A
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US140927A
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US1420018A
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US683885A
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US1003477A
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US1889951A
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US1798485A
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GB392364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |