Patent US3140754A successfully refreshed from Google Patents.
US3140754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas mask speech transmission
Assignee: Individual
•
Filing: 1959-12-03
•
Granted: 1964-07-14
•
Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Armard V Motsinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:03
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A VOICE-TRANSMITTING DEVICE FOR GAS MASKS COMPRISING A CUP-SHAPED HOUSING HAVING A CYLINDRICAL WALL AND A BASE, AT LEAST ONE APERTURE FOR THE ENTRANCE OF SOUND WAVES ECCENTRICALLY POSITIONED IN SAID BASE, A DIAPHRAGM OF THIN SHEET MATERIAL EXTENDING ACROSS SAID HOUSING JOINED AT ITS PERIPHERY TO SAID CYLINDRICAL WALL, AND SPACED FROM AND PARALLEL TO SAID BASE, A PERFORATED PLATE BETWEEN AND PARALLEL TO SAID BASE AND DIAPHRAGM, A SECOND PERFORATED PLATE ON THE OTHER SIDE OF, SPACED FROM, AND SUBSTANTIALLY PARALLEL TO SAID DIAPHRAGM, A THIRD PERFORATED PLATE BETWEEN AND PARALLEL TO SAID SECOND PLATE AND SAID DIAPHRAGM, SAID FIRST AND THIRD PLATES BEING PERFORATED ONLY IN THEIR PERIPHERAL AREAS AND SAID SECOND PLATE BEING PERFORATED ONLY IN ITS CENTRAL AREA.
Claim 2
Dependent Claim
123 words
A VOICE-TRANSMITTING DEVICE FOR GAS MASKS COMPRISING A CUP-SHAPED HOUSING HAVING A CYLINDRICAL WALL AND A BASE, AT LEAST ONE APERTURE FOR THE ENTRANCE OF SOUND WAVES ECCENTRICALLY POSITIONED IN SAID BASE, A DIAPHRAGM OF THIN SHEET MATERIAL EXTENDING ACROSS SAID HOUSING JOINED AT ITS PERIPHERY TO SAID CYLINDRICAL WALL, AND SPACED FROM AND PARALLEL TO SAID BASE, A PERFORATED PLATE BETWEEN AND PARALLEL TO SAID BASE AND DIAPHRAGM, A SECOND PERFORATED PLATE ON THE OTHER SIDE OF, SPACED FROM, AND SUBSTANTIALLY PARALLEL TO SAID DIAPHRAGM, A THIRD PERFORATED PLATE BETWEEN AND PARALLEL TO SAID SECOND PLATE AND SAID DIAPHRAGM, SAID FIRST AND THIRD PLATES BEING PERFORATED ONLY IN THEIR PERIPHERAL AREAS AND SAID SECOND PLATE BEING PERFORATED ONLY IN ITS CENTRAL AREA.
References Cited (Backward Citations)
GB572888A
Cited
US2466127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |