Patent US3131877A successfully refreshed from Google Patents.
US3131877A
Expired / Lapsed
US
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Pump
Assignee: Beloit Iron Works Inc
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Filing: 1961-06-23
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Granted: 1964-05-05
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Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Hugo F Budzien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:25
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04; F04D7/045; F04D13/00; F04D13/02; F04D17/00; F04D17/08; F04D17/10; F04D17/12; F04D17/127; F04D25/00; F04D25/02; F04D29/00; F04D29/40; F04D29/42; F04D29/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A PAPER STOCK PUMP COMPRISING A CASING HAVING A PUMPING CHAMBER WITH AN INLET AND AN OUTLET, ROTARY FLUID DISPLACEMENT MEANS IN SAID CHAMBER TO MOVE PAPER PULP FROM THE INLET TO THE OUTLET AT INCREASED PRESSURE FOR DISCHARGE IN THE FORM OF A STREAM, AND A VIBRATORY MEMBER COMPRISING A SHARP-EDGED PLATE IN SAID CASING AGAINST WHICH THE STREAM IS DIRECTED, THEREBY PRODUCING A HIGH INTENSITY VIBRATION FOR ASSITING IN BREAKING UP LUMPS IN THE PAPER PULP.
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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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |