US2100655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound attenuating device
Assignee: Maxim Silencer Co
•
Filing: 1935-10-26
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Granted: 1937-11-30
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Expires: 1955-10-26
Abstract
No abstract record available.
Inventors
- 👤 Roland B Bourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:32
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/003; F01N1/02; F16; F16L; F16L55/00; F16L55/02; F01N2490/00; F01N2490/15; F01N2490/155; F01N2490/20; Y; Y10; Y10S; Y10S55/00; Y10S55/30
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) | 1940-11-29 | 1941-05-31 | 1941-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-11-29 | 1945-05-31 | 1945-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-11-29 | 1949-05-31 | 1949-11-30 | $7700.00 | Window Closed / Lapsed |