Patent US2681719A successfully refreshed from Google Patents.
US2681719A
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US
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Spring connecting and anchorage means
Assignee: Underwood Corp
•
Filing: 1949-12-24
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Granted: 1954-06-22
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Expires: 1969-12-24
Abstract
No abstract record available.
Inventors
- 👤 Edgar D Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:07
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1437329A
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US1757437A
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US2043303A
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US2531911A
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US2568390A
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US2567508A
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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) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |