US3420375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter with automatic bypass-shutoff
Assignee: Marvel Engineering Co
•
Filing: 1966-03-21
•
Granted: 1969-01-07
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Walter J Kudlaty
- 👤 Peter Heinrich Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:50
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; B01D35/147; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A FILTER ASSEMBLY INCLUDING HOUSING, A FILTER CHAMBER REMOVABLY SECURED TO SAID HOUSING, A HOUSING INLET FOR FLUID PRESSURE, A CHAMBER INLET FOR FLUID PRESSURE, A HOUSING OUTLET, FOR FLUID PRESSURE, A CHAMBER OUTLET FOR FLUID PRESSURE, A FILTER ELEMENT WITHIN THE CHAMBER INTERMEDIATE THE INLET AND OUTLET, A SPOOL VALVE SLIDABLE IN SAID HOUSING, PASSAGE MEANS POSITIONED IN SAID SPOOL VALVE TO COMMUNICATE AND HOUSING INLET WITH SAID CHAMBER INLET AND SAID HOUSING OUTLET WITH SAID CHAMBER OUTLET WHEN SAID SPOOL VALVE IS IN ONE POSITION AND TO COMMUNICATE SAID HOUSING INLET AND SAID HOUSING OUTLET WHEN SAID SPOOL VALVE IS IN ANOTHER POSITION, SAID SPOOL VALVE HAVING PORTION CLOSING SAID CHAMBER INLET AND OUTLET WHEN IN SAID OTHER POSITION.
Claim 2
Dependent Claim
121 words
A FILTER ASSEMBLY INCLUDING HOUSING, A FILTER CHAMBER REMOVABLY SECURED TO SAID HOUSING, A HOUSING INLET FOR FLUID PRESSURE, A CHAMBER INLET FOR FLUID PRESSURE, A HOUSING OUTLET, FOR FLUID PRESSURE, A CHAMBER OUTLET FOR FLUID PRESSURE, A FILTER ELEMENT WITHIN THE CHAMBER INTERMEDIATE THE INLET AND OUTLET, A SPOOL VALVE SLIDABLE IN SAID HOUSING, PASSAGE MEANS POSITIONED IN SAID SPOOL VALVE TO COMMUNICATE AND HOUSING INLET WITH SAID CHAMBER INLET AND SAID HOUSING OUTLET WITH SAID CHAMBER OUTLET WHEN SAID SPOOL VALVE IS IN ONE POSITION AND TO COMMUNICATE SAID HOUSING INLET AND SAID HOUSING OUTLET WHEN SAID SPOOL VALVE IS IN ANOTHER POSITION, SAID SPOOL VALVE HAVING PORTION CLOSING SAID CHAMBER INLET AND OUTLET WHEN IN SAID OTHER POSITION.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |