US2620602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing machine
Assignee: Fafnir Bearing Co
•
Filing: 1949-07-01
•
Granted: 1952-12-09
•
Expires: 1969-07-01
Abstract
No abstract record available.
Inventors
- 👤 Charles G Schenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/02; B24B19/06; B24B21/00; B24B21/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US605283A
Cited
US675209A
Cited
US790705A
Cited
US1246958A
Cited
US1488457A
Cited
US1475741A
Cited
US1559643A
Cited
US1877572A
Cited
US2241568A
Cited
US2119862A
Cited
US2283792A
Cited
US2341442A
Cited
US2337776A
Cited
US2386850A
Cited
US2445391A
Cited
US2479536A
Cited
US2489811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |