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Patent US3312349A successfully refreshed from Google Patents.
US3312349A
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US
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Filter elements
Assignee: Rosaen Filter Co
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Filing: 1964-05-18
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Granted: 1967-04-04
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:11
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D24/00; B01D24/007; B01D24/008; B01D24/02; B01D24/04; B01D24/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A FILTER ELEMENT COMPRISING: (A) A PAIR OF SPACED, SUBSTANTIALLY CONCENTRIC, CYLINDRICAL PERFORATED MEMBERS POSITION TO DEFINE AN ANNULAR SPACE BETWEEN SAID MEMBERS AND AN OUTLET SPACED DEFINED BY THE INNERMOST ONE OF SAID MEMBERS, (B) MEANS CLOSING THE ENDS OF SAID SPACES, (C) FILTERING MEANS SUBSTANTIALLY FILLING SAID ANNULAR SPACE AND COMPRISING A PLURALITY OF SUBSTANTIALLY SPHERICAL FILTERING, MEMBERS, AND
Claim 2
Dependent Claim
61 words
A FILTER ELEMENT COMPRISING: (A) A PAIR OF SPACED, SUBSTANTIALLY CONCENTRIC, CYLINDRICAL PERFORATED MEMBERS POSITION TO DEFINE AN ANNULAR SPACE BETWEEN SAID MEMBERS AND AN OUTLET SPACED DEFINED BY THE INNERMOST ONE OF SAID MEMBERS, (B) MEANS CLOSING THE ENDS OF SAID SPACES, (C) FILTERING MEANS SUBSTANTIALLY FILLING SAID ANNULAR SPACE AND COMPRISING A PLURALITY OF SUBSTANTIALLY SPHERICAL FILTERING, MEMBERS, AND
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |