US2687667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer for igniting explosives
Assignee: Inventa AG fuer Forschung und Patentverwertung
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Filing: 1951-08-31
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Granted: 1954-08-31
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Expires: 1971-08-31
Abstract
No abstract record available.
Inventors
- 👤 Gunther Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:08
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE245922C
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DE33599C
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GB190109311A
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GB190209380A
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GB191216963A
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US1832052A
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US2326008A
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US2517763A
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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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |