Patent US2407700A successfully refreshed from Google Patents.
US2513596A
Expired / Lapsed
US
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Child's block set
Assignee: CHICAGO LIGHTHOUSE FOR BLI
•
Filing: 1948-11-06
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Granted: 1950-07-04
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Expires: 1968-11-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Severson
- 👤 Sidney L Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:12
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63F; A63F9/00; A63F9/0098; G; G09; G09B; G09B19/00; G09B19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1216840A
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CH78432A
Cited
US1405010A
Cited
US1472536A
Cited
GB214098A
Cited
GB300333A
Cited
US1895611A
Cited
US2014675A
Cited
CH197004A
Cited
GB560302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |