Patent US3081622A successfully refreshed from Google Patents.
US2878752A
Expired / Lapsed
US
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Blasting initiator
Assignee: EIDP Inc
•
Filing: 1956-12-05
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Granted: 1959-03-24
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Johnson Charles Russell
- 👤 Swanson Merrill Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:45
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/18; F42B3/12; F42B3/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |