US2830191A
Expired / Lapsed
US
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Pulse-producing apparatus for calibrating detonation meters
Assignee: Phillips Petroleum Co
•
Filing: 1951-11-05
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Granted: 1958-04-08
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Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Mccollom
- 👤 Boisblanc Deslonde R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:27
CPC Classifications
G; G04; G04F; G04F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2515630A
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US2262362A
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US2488430A
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US2477821A
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US2491591A
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US2671128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |