US3055648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining blasting apparatus
Assignee: Hercules Powder Co
•
Filing: 1958-12-30
•
Granted: 1962-09-25
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Expires: 1978-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert W Lawrence
- 👤 Robert J Shiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/10; E; E21; E21B; E21B3/00; E21B3/02; E21B3/022; E21C; E21C37/00; E21C37/06; E21C37/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US722166A
Cited
US1740683A
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US2151328A
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US2314366A
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US2869462A
Cited
US2799488A
Cited
US2883079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |