Patent US2742820A successfully refreshed from Google Patents.
US2742820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact and stop mechanism for launchers
Assignee: Individual
•
Filing: 1952-12-15
•
Granted: 1956-04-24
•
Expires: 1972-12-15
Abstract
No abstract record available.
Inventors
- 👤 Brown Robinson
- 👤 Hugh E Metcalf
- 👤 John F Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:12
CPC Classifications
F; F41; F41F; F41F3/00; F41F3/04; F41F3/052; F41F3/045; F41F3/0455
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) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |