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Patent US2837391A successfully refreshed from Google Patents.
US2837391A
Expired / Lapsed
US
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Adjustable slant drawing board stand
Assignee: Individual
•
Filing: 1955-10-10
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Granted: 1958-06-03
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Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 Homer W Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
A; A47; A47B; A47B41/00; A47B41/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US527017A
Cited
CH9141A
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GB189916864A
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US785147A
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US836551A
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US1142673A
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US1462615A
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US1990032A
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US1975857A
Cited
US2514735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |