Patent US2851827A successfully refreshed from Google Patents.
US2851827A
Expired / Lapsed
US
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Multiple wheel grinding machine
Assignee: Saint Gobain Abrasives Inc
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Filing: 1957-11-08
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Granted: 1958-09-16
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Expires: 1977-11-08
Abstract
No abstract record available.
Inventors
- 👤 Oiva E Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:54
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/18; B24B49/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE24378E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |