US2852369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digester strainer
Assignee: Electric Steel Foundry Co
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Filing: 1954-09-17
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Granted: 1958-09-16
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Expires: 1974-09-17
Abstract
No abstract record available.
Inventors
- 👤 Eyolfson Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
D; D21; D21F; D21F7/00; D21F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A SECTIONAL DIGESTER SCREEN COMPRISING A PLURALITY OF SECTIONS, EACH OF SAID SECTIONS COMPRISING A FRAME INCLUDING AN UPPER BEARING SEGMENT, A LOWER BEARING SEGMENT AND A PLURALITY OF SPACED RIBS EXTENDING BETWEEN SAID SEGMENTS, AND SCREENING MEANS COVERING THE SPACES BETWEEN SAID RIBS AND SEGMENTS, ONE SIDE EDGE OF EACH FRAME HAVING A CONTINUOUS COVERING FLANGE EXTENDING LATERALLY THEREFROM AND CLOSELY OVERLYING THE INNER SURFACE OF AN ADJOINING FRAME THROUGHOUT ITS LENGTH, SAID COVERING FLANGE PROGRESSIVELY DECREASING IN WIDTH FROM BOTH ENDS TOWARD ITS MIDDLE.
Claim 2
Dependent Claim
86 words
A SECTIONAL DIGESTER SCREEN COMPRISING A PLURALITY OF SECTIONS, EACH OF SAID SECTIONS COMPRISING A FRAME INCLUDING AN UPPER BEARING SEGMENT, A LOWER BEARING SEGMENT AND A PLURALITY OF SPACED RIBS EXTENDING BETWEEN SAID SEGMENTS, AND SCREENING MEANS COVERING THE SPACES BETWEEN SAID RIBS AND SEGMENTS, ONE SIDE EDGE OF EACH FRAME HAVING A CONTINUOUS COVERING FLANGE EXTENDING LATERALLY THEREFROM AND CLOSELY OVERLYING THE INNER SURFACE OF AN ADJOINING FRAME THROUGHOUT ITS LENGTH, SAID COVERING FLANGE PROGRESSIVELY DECREASING IN WIDTH FROM BOTH ENDS TOWARD ITS MIDDLE.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |