US2456797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair iron for tiltable seats and backs
Assignee: COLLIER KEYWORTH Co
•
Filing: 1945-05-25
•
Granted: 1948-12-21
•
Expires: 1965-05-25
Abstract
No abstract record available.
Inventors
- 👤 Henry W Sheldrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:58
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/443; A47C7/441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US180548A
Cited
US730875A
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US956949A
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US1909018A
Cited
US1986105A
Cited
US2211090A
Cited
US2321385A
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US2374350A
Cited
US2341124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |