Patent US3742435A successfully refreshed from Google Patents.
Patent US3256989A successfully refreshed from Google Patents.
US3256989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw neck filter cartridge
Assignee: Champion Laboratories Inc
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Filing: 1963-03-13
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Granted: 1966-06-21
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 William H Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:35
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/08; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A SCREW NECK FLUID FILTER CARTRIDGE, THE COMBINATION COMPRISING: (A) AN OPEN ENDED CYLINDRICAL HOUSING; (B) A FIRST CIRCULAR END PLATE MEMBER DISPOSED INTERMEDIATE THE ENDS OF SAID CYLINDRICAL HOUSING, SAID MEMBER HAVING A DIAMETER LESS THAN THE INSIDE DIAMETER OF SAID CYLINDRICAL HOUSING AND HAVING A CENRICALLY DISPOSED OPENING THERETHROUGH; (C) A SECOND CIRCULAR END PLATE MEMBER FIXEDLY SECURED ON THE OPEN END OF SAID CYLINDRICAL HOUSING, SAID SECOND MEMBER HAVING AN AXIALLY DISPLACED PERIPHERAL PORTION ADJACENT TO SAID HOUSING TO DEFINE A CENTRALLY DISPOSED RECESS THAT IS RADIALLY DISPLACED FROM THE INSIDE OF SAID CYLINDRICAL HOUSING AND A CENTRALLY DISPOSED OPENING THERETHROUGH; (D) A SCREW THREADED MEMBER FIXEDLY SECURED ON SAID SECOND CIRCULAR MEMBER AND SAID HOUSING; (E) A FIRST TUBE MEMBER EXTENDING INTERMEDIATE THE CENTRALLY DISPOSED OPENINGS IN SAID FIRST AND SECOND END PLATE MEMBERS;
Claim 2
Dependent Claim
139 words
IN A SCREW NECK FLUID FILTER CARTRIDGE, THE COMBINATION COMPRISING: (A) AN OPEN ENDED CYLINDRICAL HOUSING; (B) A FIRST CIRCULAR END PLATE MEMBER DISPOSED INTERMEDIATE THE ENDS OF SAID CYLINDRICAL HOUSING, SAID MEMBER HAVING A DIAMETER LESS THAN THE INSIDE DIAMETER OF SAID CYLINDRICAL HOUSING AND HAVING A CENRICALLY DISPOSED OPENING THERETHROUGH; (C) A SECOND CIRCULAR END PLATE MEMBER FIXEDLY SECURED ON THE OPEN END OF SAID CYLINDRICAL HOUSING, SAID SECOND MEMBER HAVING AN AXIALLY DISPLACED PERIPHERAL PORTION ADJACENT TO SAID HOUSING TO DEFINE A CENTRALLY DISPOSED RECESS THAT IS RADIALLY DISPLACED FROM THE INSIDE OF SAID CYLINDRICAL HOUSING AND A CENTRALLY DISPOSED OPENING THERETHROUGH; (D) A SCREW THREADED MEMBER FIXEDLY SECURED ON SAID SECOND CIRCULAR MEMBER AND SAID HOUSING; (E) A FIRST TUBE MEMBER EXTENDING INTERMEDIATE THE CENTRALLY DISPOSED OPENINGS IN SAID FIRST AND SECOND END PLATE MEMBERS;
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |