Patent US2247130A successfully refreshed from Google Patents.
US2247130A
Expired / Lapsed
US
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Noise and wave muffling conduit for fluid under pressure
Assignee: Individual
•
Filing: 1938-07-09
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Granted: 1941-06-24
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Expires: 1958-07-09
Abstract
No abstract record available.
Inventors
- 👤 Mccurdy Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:54
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/083; F01N1/003; F01N1/06; F01N1/12
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) | 1944-06-23 | 1944-12-23 | 1945-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-23 | 1948-12-23 | 1949-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-23 | 1952-12-23 | 1953-06-24 | $7700.00 | Window Closed / Lapsed |