US3259248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter unit, cartridge and coupling means
Assignee: Wood Conversion Co
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Filing: 1963-01-30
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Granted: 1966-07-05
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Donald E Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/39; B01D29/41; B01D2201/00; B01D2201/40; B01D2201/4084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A COUPLING UNION COMPRISING TWO SECTIONS, EACH HAVING AN OPENING THERETHROUGH, A FIRST SECTION HAVING A BODY PORTION AND A COLLAR SURROUNDING ITS SAID OPENING AND EXTENDING AXIALLY OF THE OPENING FROM SAID BODY PORTION, SAID SECOND SECTION HAVING ITS OPENING OF SIZE AND SHAPE SLIDINGLY TO RECEIVE SAID COLLAR, SAID SECOND SECTION HAVING A BODY PORTION TO OPPOSE THE BODY PORTION OF SAID FIRST SECTION WHEN SAID TWO SECTIONS ARE IN ASSEMBLED POSITION WITH SAID COLLAR SLIDINGLY POSITIONED WITHIN SAID OPENING OF THE SECOND SECTION, THE EXTERNAL FACES OF THE RESULTIG ASSEMBLY HAVING MEANS TO INTERFIT COMPLEMENTARILY AN EXTERNAL FACE ON AN ADDITIONAL ONE OF SAID SECTIONS WITH AT LEAST ONE OF SAID SECTIONS IN SAID ASSEMBLY AT ITS EXTERNAL FACE, WHEREBY A PILE OF SUCH COUPLING UNIONS MAY BE FORMED.
Claim 2
Dependent Claim
132 words
A COUPLING UNION COMPRISING TWO SECTIONS, EACH HAVING AN OPENING THERETHROUGH, A FIRST SECTION HAVING A BODY PORTION AND A COLLAR SURROUNDING ITS SAID OPENING AND EXTENDING AXIALLY OF THE OPENING FROM SAID BODY PORTION, SAID SECOND SECTION HAVING ITS OPENING OF SIZE AND SHAPE SLIDINGLY TO RECEIVE SAID COLLAR, SAID SECOND SECTION HAVING A BODY PORTION TO OPPOSE THE BODY PORTION OF SAID FIRST SECTION WHEN SAID TWO SECTIONS ARE IN ASSEMBLED POSITION WITH SAID COLLAR SLIDINGLY POSITIONED WITHIN SAID OPENING OF THE SECOND SECTION, THE EXTERNAL FACES OF THE RESULTIG ASSEMBLY HAVING MEANS TO INTERFIT COMPLEMENTARILY AN EXTERNAL FACE ON AN ADDITIONAL ONE OF SAID SECTIONS WITH AT LEAST ONE OF SAID SECTIONS IN SAID ASSEMBLY AT ITS EXTERNAL FACE, WHEREBY A PILE OF SUCH COUPLING UNIONS MAY BE FORMED.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |