Patent US3237775A successfully refreshed from Google Patents.
US3237775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beaded filter tube filter assembly
Assignee: EMD Millipore Corp
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Filing: 1962-11-29
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Granted: 1966-03-01
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 David B Porter
- 👤 Richard A Paine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/52; B01D29/56; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A MICROPOROUS FILTER CATRIDGE HAVING A TUBULAR WALL, BASE, CAP, AND MANIFOLD PLATE ELEMENTS, AND A PLURALITY OF FILTER TUBES EXTENDING BETWEEN SAID BASE AND THE MANIFOLD PLATE IN SPACED ARRAY, EACH OF SAID FILTER TUBES COMPRISING A RIGID PERFORATED TUBE AND A THIN MINCROPOUS FILM LOOSELY OVERLYING SAID TUBE, THE BORE SPACE OF SAID FILTER TUBES BEING IN COMMUNICATION WITH SPACE ABOVE SAID MANIFOLD PLATE, MEANS TO RELIEVE STRESS ON THE FILM OF EACH TUBE IMPOSED ADJACENT ITS ENDS COM-
Claim 2
Dependent Claim
82 words
IN A MICROPOROUS FILTER CATRIDGE HAVING A TUBULAR WALL, BASE, CAP, AND MANIFOLD PLATE ELEMENTS, AND A PLURALITY OF FILTER TUBES EXTENDING BETWEEN SAID BASE AND THE MANIFOLD PLATE IN SPACED ARRAY, EACH OF SAID FILTER TUBES COMPRISING A RIGID PERFORATED TUBE AND A THIN MINCROPOUS FILM LOOSELY OVERLYING SAID TUBE, THE BORE SPACE OF SAID FILTER TUBES BEING IN COMMUNICATION WITH SPACE ABOVE SAID MANIFOLD PLATE, MEANS TO RELIEVE STRESS ON THE FILM OF EACH TUBE IMPOSED ADJACENT ITS ENDS COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |