US3236328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical device with protective screen
Assignee: Bosch Security Systems Inc
•
Filing: 1962-06-27
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Granted: 1966-02-22
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Louis R Burroughs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:03
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/08; H04R1/083; H04R1/086; H04R2410/00; H04R2410/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN ELECTROACOUSTICAL TRANSDUCER COMPRISING AN ELECTROACOUSTIC TRANSDUCER UNIT HAVING A CASING WITH AN OPENING THEREIN, A DIAPHRAGM DISPOSED WITHIN THE CASING CONFRONTING THE OPENING, AND A SCREEN ACOUSTICALLY SEALED ON THE CASING ABOUT THE OPENING AND EXTENDING OVER THE OPENING, SAID SCREEN COMPRISING A MEMBER OF OPEN CELLULAR FOAM PLASTIC HAVING A THICKNESS AT LEAST EQUAL TO TWICE THE DIAMETER OF THE AVERAGE CELL IN SAID MEMBER.
Claim 2
Dependent Claim
67 words
AN ELECTROACOUSTICAL TRANSDUCER COMPRISING AN ELECTROACOUSTIC TRANSDUCER UNIT HAVING A CASING WITH AN OPENING THEREIN, A DIAPHRAGM DISPOSED WITHIN THE CASING CONFRONTING THE OPENING, AND A SCREEN ACOUSTICALLY SEALED ON THE CASING ABOUT THE OPENING AND EXTENDING OVER THE OPENING, SAID SCREEN COMPRISING A MEMBER OF OPEN CELLULAR FOAM PLASTIC HAVING A THICKNESS AT LEAST EQUAL TO TWICE THE DIAMETER OF THE AVERAGE CELL IN SAID MEMBER.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |