Patent US3706800A successfully refreshed from Google Patents.
Patent US2654385A successfully refreshed from Google Patents.
Patent US3320792A successfully refreshed from Google Patents.
US3320792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter tester
Assignee: Mobil Oil AS
•
Filing: 1964-09-16
•
Granted: 1967-05-23
•
Expires: 1984-09-16
Abstract
No abstract record available.
Inventors
- 👤 Peranio Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:35
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/082; G01N15/0826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A FILTER TESTER COMPRISING: (A) A CHAMBER, (B) A FIRST OPENING IN SAID CHAMBER ADAPTED TO RECEIVE THE FILTER THEREOVER, (C) MEANS TO REDUCE THE PRESSURE IN SAID CHAMBER RELATIVE TO AMBIENT PRESSURE, (D) MEANS TO MONITOR A VARIABLE WHICH IS A FUNCTION OF THE PRESSURE IN SAID CHAMBER, (E) A SECOND OPENING IN SAID CHAMBER, (F) COVER MEANS TO ADJUSTABLY RESTRICT THE AREA OF SAID SECOND OPENING, AND (G) MEANS TO MONITOR THE MAGNITUDE OF THE AIR FLOW THROUGH SAID SECOND OPENING, WHEREIN AIR IS DRAWN INTO SAID CHAMBER THROUGH SAID FIRST AND SECOND OPENINGS, THE FLOW OF SAID AIR ENTERING THROUGH SAID SECOND OPENING BEING IN PROPORTION TO THE RESTRICTIONS PLACED ACROSS SAID FIRST OPENING DUE TO THE LIMITED POROSITY OF A FILTER PLACED THEREOVER.
Claim 2
Dependent Claim
127 words
A FILTER TESTER COMPRISING: (A) A CHAMBER, (B) A FIRST OPENING IN SAID CHAMBER ADAPTED TO RECEIVE THE FILTER THEREOVER, (C) MEANS TO REDUCE THE PRESSURE IN SAID CHAMBER RELATIVE TO AMBIENT PRESSURE, (D) MEANS TO MONITOR A VARIABLE WHICH IS A FUNCTION OF THE PRESSURE IN SAID CHAMBER, (E) A SECOND OPENING IN SAID CHAMBER, (F) COVER MEANS TO ADJUSTABLY RESTRICT THE AREA OF SAID SECOND OPENING, AND (G) MEANS TO MONITOR THE MAGNITUDE OF THE AIR FLOW THROUGH SAID SECOND OPENING, WHEREIN AIR IS DRAWN INTO SAID CHAMBER THROUGH SAID FIRST AND SECOND OPENINGS, THE FLOW OF SAID AIR ENTERING THROUGH SAID SECOND OPENING BEING IN PROPORTION TO THE RESTRICTIONS PLACED ACROSS SAID FIRST OPENING DUE TO THE LIMITED POROSITY OF A FILTER PLACED THEREOVER.
References Cited (Backward Citations)
US2072369A
Cited
US3066527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |