Patent US642828A successfully refreshed from Google Patents.
US642828A
Expired / Lapsed
US
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Grinding or polishing wheel.
Assignee: Individual
•
Filing: 1899-07-17
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Granted: 1900-02-06
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Expires: 1919-07-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Spohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:13
CPC Classifications
B; B24; B24D; B24D5/00; B24D5/02; B24D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1903-02-06 | 1903-08-08 | 1904-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-02-06 | 1907-08-08 | 1908-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-02-06 | 1911-08-08 | 1912-02-07 | $7700.00 | Window Closed / Lapsed |