Patent US2513889A successfully refreshed from Google Patents.
US2513889A
Expired / Lapsed
US
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Device in easels for locking the parts of the displaceable legs to one another
Assignee: Becker Wilhelm AB
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Filing: 1945-12-13
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Granted: 1950-07-04
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Expires: 1965-12-13
Abstract
No abstract record available.
Inventors
- 👤 Nillson Nils Adrian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:58
CPC Classifications
A; A47; A47B; A47B97/00; A47B97/04; A47B97/08; F; F16; F16H; F16H21/00; F16H21/06; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/71; Y10T403/7152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |