Patent US2537570A successfully refreshed from Google Patents.
US2537570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding disk
Assignee: —
•
Filing: —
•
Granted: 1951-01-09
•
Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:54
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/11; B02C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US111956A
Cited
US130719A
Cited
US203100A
Cited
US336533A
Cited
US938798A
Cited
US1098325A
Cited
US1537759A
Cited
US1728178A
Cited
US1847967A
Cited
FR759066A
Cited
US2255071A
Cited
US2412680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |