US2563509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve controlled silencer
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
•
Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005; B01J8/18; B01J8/1872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US328840A
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US359389A
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US2157115A
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US821828A
Cited
US847456A
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US1173447A
Cited
US1810252A
Cited
US1857845A
Cited
US2019746A
Cited
US2378607A
Cited
US2378542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |