US2501993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair attachment device
Assignee: Individual
•
Filing: 1946-12-10
•
Granted: 1950-03-28
•
Expires: 1966-12-10
Abstract
No abstract record available.
Inventors
- 👤 Richard J Conradt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
B; B61; B61D; B61D33/00; B60; B60N; B60N2/00; B60N2/80; B60N2/882; B61D33/0007; B61D33/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US969251A
Cited
US1515467A
Cited
US1864615A
Cited
US1845401A
Cited
US2031643A
Cited
US2107404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |