US2821923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mortar training device and components thereof
Assignee: PATENT LICENSE CORP
•
Filing: 1953-05-19
•
Granted: 1958-02-04
•
Expires: 1973-05-19
Abstract
No abstract record available.
Inventors
- 👤 William D Alderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:37
CPC Classifications
F; F42; F42B; F42B8/00; F42B8/02; F42B8/10; F42B8/12; F42B8/20
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |