Patent US2807916A successfully refreshed from Google Patents.
US2807916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous external and internal centerless grinding machine
Assignee: Federal Mogul Bower Bearings Inc
•
Filing: 1954-04-12
•
Granted: 1957-10-01
•
Expires: 1974-04-12
Abstract
No abstract record available.
Inventors
- 👤 John R Squire
- 👤 Herman A Ortegren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:54
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/18; B24B5/185
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US530292A
Cited
US1294024A
Cited
US1743116A
Cited
US1842375A
Cited
US1841809A
Cited
US2221827A
Cited
US2333411A
Cited
US2478607A
Cited
US2646652A
Cited
US2694883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |