Patent US2683640A successfully refreshed from Google Patents.
US2683640A
Expired / Lapsed
US
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Gravity action palette attachment for drawing table tops
Assignee: Individual
•
Filing: 1951-05-15
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Granted: 1954-07-13
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Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Louis M Mangine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:31
CPC Classifications
B; B43; B43M; B43M99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US639611A
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US678745A
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FR332883A
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FR403952A
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US1125757A
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US1221658A
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US1394513A
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US1455221A
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US1558256A
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US1888478A
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US1933210A
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US1963467A
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GB407558A
Cited
US2426097A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |