US3433364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving foldable bookstand
Assignee: TSUAN TONG CHEN
•
Filing: 1967-01-19
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Granted: 1969-03-18
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Expires: 1987-01-19
Abstract
No abstract record available.
Inventors
- 👤 Tsuan-Tong Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:38
CPC Classifications
A; A47; A47B; A47B65/00; A47B11/00; A47B49/00; A47B49/004; A47B63/00; A47B65/20; A47F; A47F5/00; A47F5/02; A47F5/10; A47F5/13; A47F7/00; A47F7/14; A47F7/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |