Patent US3716759A successfully refreshed from Google Patents.
Patent US2623921A successfully refreshed from Google Patents.
US2623921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the ignition of explosive material in liquids
Assignee: Individual
•
Filing: 1950-04-04
•
Granted: 1952-12-30
•
Expires: 1970-04-04
Abstract
No abstract record available.
Inventors
- 👤 Smits Wytze Beye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
F; F23; F23Q; F23Q3/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |