US3276535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe microphone with horn coupling
Assignee: National Research Council Canada
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Filing: 1963-04-08
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Granted: 1966-10-04
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Edgar A G Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:59
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/342; Y; Y10; Y10S; Y10S181/00; Y10S181/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A DEVICE FOR MEASURING SOUND PRESSURE LEVELS COMPRISING: A MICROPHONE; A UNIFORM PROBE TUBE; AND MEANS FOR COUPLING THE TUBE TO THE MICROPHONE, SAID MEANS INCLUDING A HORN TERMINATED BY AN ACOUSTIV RESISTANCE ELEMENT, SAID HORN HAVING A SMALL END ADAPTED FOR CONNECTION TO THE PROBE TUBE, AND A LARGE END ADAPTED FOR CLOSE COUPLING TO SAID MICROPHONE AND SAID RESISTANCE ELEMENT.
Claim 2
Independent Claim
62 words
A DEVICE FOR MEASURING SOUND PRESSURE LEVELS COMPRISING: A MICROPHONE; A UNIFORM PROBE TUBE; AND MEANS FOR COUPLING THE TUBE TO THE MICROPHONE, SAID MEANS INCLUDING A HORN TERMINATED BY AN ACOUSTIV RESISTANCE ELEMENT, SAID HORN HAVING A SMALL END ADAPTED FOR CONNECTION TO THE PROBE TUBE, AND A LARGE END ADAPTED FOR CLOSE COUPLING TO SAID MICROPHONE AND SAID RESISTANCE ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |