Patent US2897561A successfully refreshed from Google Patents.
US2657439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint connection
Assignee: Individual
•
Filing: 1949-06-08
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Granted: 1953-11-03
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Expires: 1969-06-08
Abstract
No abstract record available.
Inventors
- 👤 Levine Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
A; A47; A47C; A47C19/00; A47C19/02; A47C19/021; E; E06; E06B; E06B3/00; E06B3/96; E06B3/984; F; F16; F16B; F16B12/00; F16B12/54; F16B2200/00; F16B2200/67; Y; Y10; Y10T; Y10T403/00; Y10T403/44; Y10T403/46; Y10T403/4602
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |