Patent US3390421A successfully refreshed from Google Patents.
US3390421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair base
Assignee: B. L. Marble Furniture Inc
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Filing: 1966-01-04
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Granted: 1968-07-02
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Expires: 1986-01-04
Abstract
No abstract record available.
Inventors
- 👤 William H Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:01
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/002; A47C7/006; A47C7/004; B; B60; B60B; B60B33/00; B60B33/0002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2217754A
Cited
US2292445A
Cited
US2587886A
Cited
US2992803A
Cited
US2954637A
Cited
US3148855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |