Patent US2075263A successfully refreshed from Google Patents.
US2075263A
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US
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Sound attenuating device
Assignee: Maxim Silencer Co
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Filing: 1931-10-19
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Granted: 1937-03-30
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Expires: 1951-10-19
Abstract
No abstract record available.
Inventors
- 👤 Roland B Bourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:58
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F16L55/033; F01; F01N; F01N1/00; F01N1/02; F01N1/04; F01N2490/00; F01N2490/14; F01N2490/15; F01N2490/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-03-29 | 1940-09-28 | 1941-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-29 | 1944-09-28 | 1945-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-29 | 1948-09-28 | 1949-03-30 | $7700.00 | Window Closed / Lapsed |