US2043983A
Expired / Lapsed
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Apparatus for determining amplitude of sound
Assignee: JENNESS A ALDER
•
Filing: 1931-10-22
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Granted: 1936-06-16
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Expires: 1951-10-22
Abstract
No abstract record available.
Inventors
- 👤 William F Alder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:21
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/11; F; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; G01N2291/00; G01N2291/02; G01N2291/028; G01N2291/02827; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7847; Y10T137/7848
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) | 1939-06-16 | 1939-12-16 | 1940-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-06-16 | 1943-12-16 | 1944-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-06-16 | 1947-12-16 | 1948-06-16 | $7700.00 | Window Closed / Lapsed |