Patent US1431613A successfully refreshed from Google Patents.
US3266299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant flow pressure filter apparatus
Assignee: Individual
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Filing: 1965-06-14
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Granted: 1966-08-16
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Expires: 1985-06-14
Abstract
No abstract record available.
Inventors
- 👤 Roy L Swank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:13
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/08; Y; Y10; Y10S; Y10S128/00; Y10S128/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
CONSTANT FLOW PRESSURE FLITER APPARATUS FOR MEASURING THE AMOUNT OF AGGREGATE MATERIAL IN FLUID BLOOD, COMPRISING (A) A CONDUIT COMPRISING A BLOCK OF MATERIAL HAVING THERETHROUGH A STEPPED PASSAGEWAY PROVIDING A DOWNSTREAM-FACING SHOULDER, (B) A FILTER SCREEN SEATED AGAINST THE SHOULDER OF THE PASSAGEWAY AND HAVING A MULTIPLICITY OF OPENINGS OF SUBSTANTIALLY UNIFORM AND PREDETERMINED SIZE DISPOSED ACROSS SAID PASSAGEWAY FOR THE COLLECTION ON THE SCREEN OF AGGREGATE MATERIAL IN THE FLUID BLOOD AS THE LATTER IS FORCED THROUGH THE SCREEN, (C) A FILTER SCREEN RETAINER HAVING A PASSAGEWAY THERETHROUGH SECURED IN THE PASSAGEWAY OF THE BLOCK DOWNSTREAM FORM THE SHOULDER AND PRESSING AGAINST THE SCREEN WITH THE PASSAGEWAY THROUGH THE RETAINER COMMUNICATING WITH THE PASSAGEWAY THROUGH THE BLOCK,
Claim 2
Dependent Claim
119 words
CONSTANT FLOW PRESSURE FLITER APPARATUS FOR MEASURING THE AMOUNT OF AGGREGATE MATERIAL IN FLUID BLOOD, COMPRISING (A) A CONDUIT COMPRISING A BLOCK OF MATERIAL HAVING THERETHROUGH A STEPPED PASSAGEWAY PROVIDING A DOWNSTREAM-FACING SHOULDER, (B) A FILTER SCREEN SEATED AGAINST THE SHOULDER OF THE PASSAGEWAY AND HAVING A MULTIPLICITY OF OPENINGS OF SUBSTANTIALLY UNIFORM AND PREDETERMINED SIZE DISPOSED ACROSS SAID PASSAGEWAY FOR THE COLLECTION ON THE SCREEN OF AGGREGATE MATERIAL IN THE FLUID BLOOD AS THE LATTER IS FORCED THROUGH THE SCREEN, (C) A FILTER SCREEN RETAINER HAVING A PASSAGEWAY THERETHROUGH SECURED IN THE PASSAGEWAY OF THE BLOCK DOWNSTREAM FORM THE SHOULDER AND PRESSING AGAINST THE SCREEN WITH THE PASSAGEWAY THROUGH THE RETAINER COMMUNICATING WITH THE PASSAGEWAY THROUGH THE BLOCK,
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |