Patent US3507218A successfully refreshed from Google Patents.
US3507218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive container
Assignee: Seispower Corp
•
Filing: 1968-07-03
•
Granted: 1970-04-21
•
Expires: 1988-07-03
Abstract
No abstract record available.
Inventors
- 👤 Garland H Walker
- 👤 Carlos E Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:09
CPC Classifications
F; F42; F42B; F42B3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US273270A
Cited
US2913982A
Cited
US3212438A
Cited
US3246602A
Cited
US3288065A
Cited
US3401632A
Cited
US3354827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |