US2671631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving chair base
Assignee: Seng Co
•
Filing: 1950-04-27
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Granted: 1954-03-09
•
Expires: 1970-04-27
Abstract
No abstract record available.
Inventors
- 👤 Fox Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:05
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/02; F16C19/10; A; A47; A47C; A47C3/00; A47C3/18; F16C33/00; F16C33/30; F16C33/58; F16C33/588; F16C2314/00; F16C2314/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US84067A
Cited
US543719A
Cited
US845948A
Cited
US1754094A
Cited
US2141723A
Cited
US2528949A
Cited
US2542218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |