US2448382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer
Assignee: AT&T Inc
•
Filing: 1944-10-26
•
Granted: 1948-08-31
•
Expires: 1964-10-26
Abstract
No abstract record available.
Inventors
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US227341A
Cited
US1687308A
Cited
US1000702A
Cited
US1127250A
Cited
US1173687A
Cited
US1229675A
Cited
US1331474A
Cited
US1482805A
Cited
US1497553A
Cited
US1838645A
Cited
DE665167C
Cited
US2043731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |