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US2541744A
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US
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Locking mechanism for platform rockers
Assignee: JOHNSON HINGE Co
•
Filing: 1949-07-22
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Granted: 1951-02-13
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Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Burton Robert Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:52
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47C3/03; A47C3/025; A47C3/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US641680A
Cited
US2456043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |