US2323394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic attenuator for air impellers
Assignee: Individual
•
Filing: 1940-03-14
•
Granted: 1943-07-06
•
Expires: 1960-03-14
Abstract
No abstract record available.
Inventors
- 👤 Harris Eliot Huntington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:20
CPC Classifications
B; B64; B64C; B64C11/00; B63; B63H; B63H5/00; B63H5/07; B63H5/14; F; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F04D29/663; F04D29/665
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) | 1946-07-05 | 1947-01-04 | 1947-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-07-05 | 1951-01-04 | 1951-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-07-05 | 1955-01-04 | 1955-07-06 | $7700.00 | Window Closed / Lapsed |