Patent US3249702A successfully refreshed from Google Patents.
US3249702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer
Assignee: Industrial Research Products Inc
•
Filing: 1964-09-01
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Granted: 1966-05-03
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Elmer V Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:26
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/03; H04R; H04R11/00; H04R11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
AN ELECTRO-ACOUSTIC TRANSDUCER COMPRISING AN ELONGATED CASE, A MOTOR MOUNTED IN ONE END OF THE CASE, AN ARMATURE EXTENDING LENGTHWISE OF THE CASE AND HAVING A VIBRATABLE PORTION IN SAID MOTOR, AND A DISPHRAGM POSITIONED IN THE OTHER END OF THE CASE AND FORMING A FRONT SOUND CAVITY, SAID DIAPHRAGM BEING DRIVINGLY CONNECTED TO THE VIBRATABLE PORTION OF THE ARMATURE OF THE MOTOR.
Claim 2
Dependent Claim
63 words
AN ELECTRO-ACOUSTIC TRANSDUCER COMPRISING AN ELONGATED CASE, A MOTOR MOUNTED IN ONE END OF THE CASE, AN ARMATURE EXTENDING LENGTHWISE OF THE CASE AND HAVING A VIBRATABLE PORTION IN SAID MOTOR, AND A DISPHRAGM POSITIONED IN THE OTHER END OF THE CASE AND FORMING A FRONT SOUND CAVITY, SAID DIAPHRAGM BEING DRIVINGLY CONNECTED TO THE VIBRATABLE PORTION OF THE ARMATURE OF THE MOTOR.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |