Patent US2441534A successfully refreshed from Google Patents.
US2441534A
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Abrasive materials and method of manufacturing the same
Assignee: Babcock and Wilcox Co
•
Filing: 1940-01-24
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Granted: 1948-05-11
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Expires: 1960-01-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles L Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:03
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1951233A
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US2115197A
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US2256528A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-11 | 1951-11-10 | 1952-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-11 | 1955-11-10 | 1956-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-11 | 1959-11-10 | 1960-05-11 | $7700.00 | Window Closed / Lapsed |