US3424924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching system for successive ignition of firing devices at delayed intervals
Assignee: Wasag Chemie AG
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Filing: 1967-11-08
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Granted: 1969-01-28
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Expires: 1987-11-08
Abstract
No abstract record available.
Inventors
- 👤 Karl-Friedrich Leisinger
- 👤 Christian Rudiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:47
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; F; F41; F41A; F41A19/00; F41A19/58; F41A19/64; F41A19/65; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05; G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07; H03K17/51; H03K17/56; H03K17/72; H03K17/735
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |