Patent US3343535A successfully refreshed from Google Patents.
US3343535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathing mask seal
Assignee: MSA Safety Inc
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Filing: 1965-05-24
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Granted: 1967-09-26
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 John P Lytle
- 👤 David G Hannan
- 👤 Charles C Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:27
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A BREATHING MASK COMPRISING A FACE-PIECE FOR COVERING AT LEAST THE NOSE AND MOUTH, AN INHALATION VALVE CONNECTED WITH THE FACE-PIECE, THE INSIDE OF THE FACE-PIECE BEING PROVIDED AROUND ITS MARGINAL PORTION WITH AN INWARDLY OPENING CHANNEL HAVING SPACED FLEXIBLE SIDE WALLS FOR SEALING ENGAGEMENT AGAINST THE FACE, THE CHANNEL BEING PROVIDED WITH AN AIR INLET FROM THE INSIDE OF THE FACEPIECE, THE FACE-PIECE HAVING AN OUTLET THEREIN AT A POINT REMOTE FROM SAID INLET AND CONNECTING THE CHANNEL WITH THE ATMOSPHERE, AND AN EXHALATION VALVE FOR SAID OUTLET, WHEREBY AIR EXHALED IN THE FACE-PIECE WILL FLOW THROUGH SAID INLET INTO THE CHANNEL AND THROUGH THE CHANNEL TO SAID EXHALATION VALVE.
Claim 2
Dependent Claim
111 words
A BREATHING MASK COMPRISING A FACE-PIECE FOR COVERING AT LEAST THE NOSE AND MOUTH, AN INHALATION VALVE CONNECTED WITH THE FACE-PIECE, THE INSIDE OF THE FACE-PIECE BEING PROVIDED AROUND ITS MARGINAL PORTION WITH AN INWARDLY OPENING CHANNEL HAVING SPACED FLEXIBLE SIDE WALLS FOR SEALING ENGAGEMENT AGAINST THE FACE, THE CHANNEL BEING PROVIDED WITH AN AIR INLET FROM THE INSIDE OF THE FACEPIECE, THE FACE-PIECE HAVING AN OUTLET THEREIN AT A POINT REMOTE FROM SAID INLET AND CONNECTING THE CHANNEL WITH THE ATMOSPHERE, AND AN EXHALATION VALVE FOR SAID OUTLET, WHEREBY AIR EXHALED IN THE FACE-PIECE WILL FLOW THROUGH SAID INLET INTO THE CHANNEL AND THROUGH THE CHANNEL TO SAID EXHALATION VALVE.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |