Patent US2756646A successfully refreshed from Google Patents.
US2756646A
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Pulping-defibering apparatus
Assignee: E D Jones & Sons Co
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Filing: 1954-05-24
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Granted: 1956-07-31
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Dwight E Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
STOCK PULPING-DEFIBERING APPARATUS COMPRISING IN COMBINATION, A TANK HAVING BOTTOM AND SIDE WALLS, AN IMPELLER AND A DEFIBERING DISC SEPARATE THEREFROM REMOTELY MOUNTED IN SEPARATED RELATION IN SAID TANK FOR LOW AND HIGH SPEED ROTATION RESPECTIVELY, SAID IMPELLER FORMED FOR CIRCULATING STOCK ABOUT SAID TANK AND RELATIVE TO SAID DEFIBERING DISC, SAID DEFIBERING DISC INCLUDING A FORWARD FACE
Claim 2
Dependent Claim
58 words
STOCK PULPING-DEFIBERING APPARATUS COMPRISING IN COMBINATION, A TANK HAVING BOTTOM AND SIDE WALLS, AN IMPELLER AND A DEFIBERING DISC SEPARATE THEREFROM REMOTELY MOUNTED IN SEPARATED RELATION IN SAID TANK FOR LOW AND HIGH SPEED ROTATION RESPECTIVELY, SAID IMPELLER FORMED FOR CIRCULATING STOCK ABOUT SAID TANK AND RELATIVE TO SAID DEFIBERING DISC, SAID DEFIBERING DISC INCLUDING A FORWARD FACE
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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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |