Patent US3492952A successfully refreshed from Google Patents.
US3492952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable drawing board
Assignee: Individual
•
Filing: 1968-04-03
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Granted: 1970-02-03
•
Expires: 1988-04-03
Abstract
No abstract record available.
Inventors
- 👤 Manuel Yourist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:07
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899772A
Cited
US635578A
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US742347A
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US756486A
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US867024A
Cited
US1457889A
Cited
US2328471A
Cited
US2781608A
Cited
US3239297A
Cited
US3381928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |