US2725822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch and method for blasting
Assignee: Hercules Powder Co
•
Filing: 1952-03-29
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Granted: 1955-12-06
•
Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Janelid Ingvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:13
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05; F42D1/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US643491A
Cited
US681637A
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US986279A
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US1029261A
Cited
US1116458A
Cited
US1132245A
Cited
US1609750A
Cited
US2590274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |