US2830686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device and system
Assignee: Wisconsin Tool & Die Co
•
Filing: 1955-05-12
•
Granted: 1958-04-15
•
Expires: 1975-05-12
Abstract
No abstract record available.
Inventors
- 👤 Melvin R Blume
- 👤 Raymond J Halicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:46
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/18; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2159
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE510278C
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US1630402A
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FR647508A
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US2199501A
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US2275758A
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US2669686A
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US2760616A
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US2701043A
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US2639796A
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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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |