US2550563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for loading and exploding charges in a borehole
Assignee: UNITED GEOPHYSICAL Co Inc
•
Filing: 1945-05-14
•
Granted: 1951-04-24
•
Expires: 1965-05-14
Abstract
No abstract record available.
Inventors
- 👤 James R Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:36
CPC Classifications
F; F42; F42D; F42D1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL10049C
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US156673A
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US224024A
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US229845A
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US971264A
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US1875583A
Cited
USRE21356E
Cited
US2164690A
Cited
US2208780A
Cited
US2362829A
Cited
US2450366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |