US2642147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baffle type silencer with a buffer chamber
Assignee: United States Steel Corp
•
Filing: 1951-10-03
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Granted: 1953-06-16
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Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 Edmund R Dearing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:19
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/10; C21B9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE652999C
Cited
US1859400A
Cited
US2274459A
Cited
US2274461A
Cited
US2455965A
Cited
US2511713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |