Patent US2527804A successfully refreshed from Google Patents.
US2527804A
Expired / Lapsed
US
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Grinding machine
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1947-10-22
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Granted: 1950-10-31
•
Expires: 1967-10-22
Abstract
No abstract record available.
Inventors
- 👤 Carl G Flygare
- 👤 Charles C Alvord
- 👤 William L Drown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:18
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/02; B24B5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516103A
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US1888710A
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US2003269A
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US2035737A
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US2224265A
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US2364804A
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US2436561A
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |