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US2982914A
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US
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Noise meter
Assignee: MSA Safety Inc
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Filing: 1955-04-25
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Granted: 1961-05-02
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Expires: 1975-04-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:21
CPC Classifications
G; G01; G01H; G01H3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511868A
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US2285482A
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GB609381A
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US2473542A
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US2582851A
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US2607528A
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US2590460A
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US2600423A
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US2750547A
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US2885544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |