US3149552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter system
Assignee: Individual
•
Filing: 1961-11-24
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Granted: 1964-09-22
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ross M Stunkard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:49
CPC Classifications
A; A62; A62B; A62B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
A VENTILATING SYSTEM FOR AN ENCLOSURE COMPRISING AN OUTER HOUSING INCLUDING A RECTANGULAR REARWARD PORTION AND A RELATIVELY LARGER RECTANGULAR FORWARD PORTION, SAID HOUSING BEING ADAPTED FOR MOUNTING IN THE WALL OF THE ENCLOSURE, SAID REARWARD PORTION INCLUDING A BASE AND FOUR SIDEWALLS AND BEING JOINED TO SAID FORWARD PORTION BY FOUR SHOULDERS EXTENDING OUTWARDLY FROM THE RESPECTIVE SIDEWALLS, AN INNER HOUSING SEATED ON SAID SHOULDERS AND RECEIVED WITHIN SAID FORWARD PORTION AND HAVING A FORWARD FACE, SAID INNER HOUSING BEING RECEIVED IN SEALING RELATIONSHIP WITHIN SAID OUTER HOUSING, SAID FILLING SAID INNER HOUSING, SAID OUTER HOUSING BEING OPEN AT ITS FORWARD END TO EXPOSE SAID FORWARD FACE OF SAID INNER HOUSING, A PAIR OF CENTRIFUGAL BLOWERS MOUNTED ON SAID INNER HOUSING WITH THEIR OUTLETS AT SAID FORWARD FACE AND THEIR INLETS LOCATED WITHIN SAID REARWARD PORTION, ONE OF SAID BLOWERS BEING ADAPTED FOR OPERATION BY 110 VOLT HOUSE CURRENT, THE OTHER OF SAID BLOWERS BEING ADAPTED FOR OPERATION BY 12 VOLT BATTERY CURRENT, A HAND OPERATED BLOWER MOUNTED ON THE FORWARD FACE OF SAID INNER HOUSING, A CONDUIT MOUNTED WITHIN SAID INNER HOUSING AND LEADING FROM SAID REARWARD PORTION TO THE INLET OF SAID HAND OPERATED BLOWER, SAID REARWARD PORTION HAVING AN AIR INLET IN ITS UPPER SIDEWALL AND A RECIRCULATION OPENING IN ITS LOWER SIDEWALL.
Claim 2
Dependent Claim
217 words
A VENTILATING SYSTEM FOR AN ENCLOSURE COMPRISING AN OUTER HOUSING INCLUDING A RECTANGULAR REARWARD PORTION AND A RELATIVELY LARGER RECTANGULAR FORWARD PORTION, SAID HOUSING BEING ADAPTED FOR MOUNTING IN THE WALL OF THE ENCLOSURE, SAID REARWARD PORTION INCLUDING A BASE AND FOUR SIDEWALLS AND BEING JOINED TO SAID FORWARD PORTION BY FOUR SHOULDERS EXTENDING OUTWARDLY FROM THE RESPECTIVE SIDEWALLS, AN INNER HOUSING SEATED ON SAID SHOULDERS AND RECEIVED WITHIN SAID FORWARD PORTION AND HAVING A FORWARD FACE, SAID INNER HOUSING BEING RECEIVED IN SEALING RELATIONSHIP WITHIN SAID OUTER HOUSING, SAID FILLING SAID INNER HOUSING, SAID OUTER HOUSING BEING OPEN AT ITS FORWARD END TO EXPOSE SAID FORWARD FACE OF SAID INNER HOUSING, A PAIR OF CENTRIFUGAL BLOWERS MOUNTED ON SAID INNER HOUSING WITH THEIR OUTLETS AT SAID FORWARD FACE AND THEIR INLETS LOCATED WITHIN SAID REARWARD PORTION, ONE OF SAID BLOWERS BEING ADAPTED FOR OPERATION BY 110 VOLT HOUSE CURRENT, THE OTHER OF SAID BLOWERS BEING ADAPTED FOR OPERATION BY 12 VOLT BATTERY CURRENT, A HAND OPERATED BLOWER MOUNTED ON THE FORWARD FACE OF SAID INNER HOUSING, A CONDUIT MOUNTED WITHIN SAID INNER HOUSING AND LEADING FROM SAID REARWARD PORTION TO THE INLET OF SAID HAND OPERATED BLOWER, SAID REARWARD PORTION HAVING AN AIR INLET IN ITS UPPER SIDEWALL AND A RECIRCULATION OPENING IN ITS LOWER SIDEWALL.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |