US3167070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respirator with positive air seal
Assignee: Individual
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Filing: 1961-06-14
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Granted: 1965-01-26
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Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Silverman Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:37
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/02; A62B18/025; A61; A61M; A61M16/00; A61M16/06; A61M16/10; A61M16/105; A61M16/106; A61M16/107; A62B18/08; A61M16/0057; A61M16/0066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A RESPIRATOR COMPRISING A MASK IN PERIPHERAL CONTACT WITH THE FACE OF A WEARER INCLUDING (A) FIRST MEANS FOR INHALING IN AND EXHALING OUT OF SAID MASK IN RESPONSE TO THE BREATHING OF SAID WEARER, (B) SECOND MEANS FORMING WITH SAID FACE ALONG THE PERIPHERY OF SAID MASK A SEALING CHAMBER, AND (C) THIRD MEANS FOR PRESSURIZING SAID CHAMBER WITH AIR TO PREVENT OUTSIDE LEAKAGE INTO SAID MASK THROUGH THE PERIPHERAL CONTACT OF SAID MASK WITH SAID FACE, (D) SAID SECOND MEANS INCLUDING (1) A CLOSED-CELL POROUS MATERIAL SEPARATING SAID SEALING CHAMBER FROM THE INTERIOR OF SAID MASK TO LIMIT THE FLOW OF SAID AIR UNDER PRESSURE INTO SAID INTERIOR TO RELATIVELY SMALL AMOUNTS AND (2) AN OPEN-CELL POROUS MATERIAL LINING THE OUTER PERIPHERY OF SAID CHAMBER TO PERMIT LIMITED UNIFORM FLOW OUTWARDLY OF SAID AIR UNDER PRESSURE.
Claim 2
Dependent Claim
138 words
A RESPIRATOR COMPRISING A MASK IN PERIPHERAL CONTACT WITH THE FACE OF A WEARER INCLUDING (A) FIRST MEANS FOR INHALING IN AND EXHALING OUT OF SAID MASK IN RESPONSE TO THE BREATHING OF SAID WEARER, (B) SECOND MEANS FORMING WITH SAID FACE ALONG THE PERIPHERY OF SAID MASK A SEALING CHAMBER, AND (C) THIRD MEANS FOR PRESSURIZING SAID CHAMBER WITH AIR TO PREVENT OUTSIDE LEAKAGE INTO SAID MASK THROUGH THE PERIPHERAL CONTACT OF SAID MASK WITH SAID FACE, (D) SAID SECOND MEANS INCLUDING (1) A CLOSED-CELL POROUS MATERIAL SEPARATING SAID SEALING CHAMBER FROM THE INTERIOR OF SAID MASK TO LIMIT THE FLOW OF SAID AIR UNDER PRESSURE INTO SAID INTERIOR TO RELATIVELY SMALL AMOUNTS AND (2) AN OPEN-CELL POROUS MATERIAL LINING THE OUTER PERIPHERY OF SAID CHAMBER TO PERMIT LIMITED UNIFORM FLOW OUTWARDLY OF SAID AIR UNDER PRESSURE.
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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |