Patent US641739A successfully refreshed from Google Patents.
US641739A
Expired / Lapsed
US
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Educational appliance or game.
Assignee: Individual
•
Filing: 1899-06-22
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Granted: 1900-01-23
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Expires: 1919-06-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:23
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/02
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) | 1903-01-23 | 1903-07-25 | 1904-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-01-23 | 1907-07-25 | 1908-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-01-23 | 1911-07-25 | 1912-01-24 | $7700.00 | Window Closed / Lapsed |