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US2587037A
Expired / Lapsed
US
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Self-ejecting key
Assignee: PETER FRIES JR
•
Filing: 1950-01-27
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Granted: 1952-02-26
•
Expires: 1970-01-27
Abstract
No abstract record available.
Inventors
- 👤 Glubiak Casper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:18
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/003; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/791
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1745836A
Cited
US1974953A
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US2295356A
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US2271048A
Cited
US2488240A
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US2500198A
Cited
US2498288A
Cited
US2514940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |