Patent US3240883A successfully refreshed from Google Patents.
US3240883A
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Assignee: Shure Inc
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Filing: 1961-05-25
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Granted: 1966-03-15
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Expires: 1981-05-25
Abstract
No abstract record available.
Inventors
- 👤 Charles E Seeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A MICROPHONE HAVING A HOUSING, A DIAPHRAGM MOUNTED IN SAID HOUSING AND A VOICE COIL MOUNTED ON ONE SIDE OF SAID DIAPHRAGMS, AN OPENING IN SAID HOUSING AT THE OPPOSITE SIDE OF SAID DIAPHRAGM FROM SAID VOICE COIL TO ADMIT ACOUSTIC VIBRATIONS TO SAID DIAPHRAGM FROM A SOURCE EXTERNAL OF SAID HOUSING, A SECOND OPENING IN SAID HOUSING, A PASSAGEWAY IN SAID HOUSING DEFINING AN ACOUSTIC COMMUNICATION BETWEEN SAID SECOND OPENING AND
Claim 2
Dependent Claim
73 words
IN A MICROPHONE HAVING A HOUSING, A DIAPHRAGM MOUNTED IN SAID HOUSING AND A VOICE COIL MOUNTED ON ONE SIDE OF SAID DIAPHRAGMS, AN OPENING IN SAID HOUSING AT THE OPPOSITE SIDE OF SAID DIAPHRAGM FROM SAID VOICE COIL TO ADMIT ACOUSTIC VIBRATIONS TO SAID DIAPHRAGM FROM A SOURCE EXTERNAL OF SAID HOUSING, A SECOND OPENING IN SAID HOUSING, A PASSAGEWAY IN SAID HOUSING DEFINING AN ACOUSTIC COMMUNICATION BETWEEN SAID SECOND OPENING AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |