Patent US4198591A successfully refreshed from Google Patents.
Patent US990250A successfully refreshed from Google Patents.
US990250A
Expired / Lapsed
US
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Attachment for disk-grinding machines.
Assignee: LOUIS WALDO THOMPSON
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Filing: 1910-07-26
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Granted: 1911-04-25
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Expires: 1930-07-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick N Gardner
- 👤 Frederic E Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/27; B24B37/30
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) | 1914-04-24 | 1914-10-24 | 1915-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1918-04-24 | 1918-10-24 | 1919-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1922-04-24 | 1922-10-24 | 1923-04-25 | $7700.00 | Window Closed / Lapsed |