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US2787508A
Expired / Lapsed
US
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Collapsible writing and reading leaf
Assignee: Individual
•
Filing: 1955-08-31
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Granted: 1957-04-02
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Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 Math Moe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:03
CPC Classifications
A; A47; A47B; A47B31/00; A47B31/06; B; B60; B60N; B60N3/00; B60N3/001; B60N3/002; B60N3/004; B61; B61D; B61D37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US133487A
Cited
US1405362A
Cited
US1436601A
Cited
US1788800A
Cited
US2001507A
Cited
US2494798A
Cited
US2693400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |