Patent US1536252A successfully refreshed from Google Patents.
Patent US2620894A successfully refreshed from Google Patents.
US2620894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaeration of viscous and plastic materials
Assignee: Akzo Nobel UK PLC
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Filing: 1948-03-25
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Granted: 1952-12-09
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Expires: 1968-03-25
Abstract
No abstract record available.
Inventors
- 👤 Peterson Leroy Eric
- 👤 Dart Sidney Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:28
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0073; B01D19/0078; D; D01; D01D; D01D1/00; D01D1/10; D01D1/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD OF REMOVING GAS BUBBLES FROM VISCOSE WHICH COMPRISES CONTINUOUSLY FEEDING A STREAM OF VISCOSE CONTAINING GAS BUBBLES DOWNWARDLY THROUGH A VESSEL SUPPORTED IN A FIELD OF HIGH FREQUENCY SOUND WAVES HAVING A FREQUENCY BETWEEN 400,000 CYCLES PER SECOND AND 1,500,000 CYCLES PER SECOND, TO THEREBY SUBJECT ALL PORTIONS OF THE VISCOSE MOVING DOWNWARDLY THROUGH THE VESSEL SIMULTANEOUSLY TO THE ACTION OF THE SOUND WAVES, CONTINUOUSLY WITHDRAWING THE VISCOSE FROM THE VESSEL AND CORRELATING THE RATE FEED OF THE VISCOSE TO THE VESSEL SO THAT A HEAD OF DRAWAL THEREOF FROM THE VESSEL SO THAT A HEAD OF VISCOSE HAVING A SUBSTANTIALLY CONSTANT DEPTH AT LEAST TWOCE THE TRANVERSE DIMENSION OF THE VESSEL IS MAINTAINED IN THE VESSEL, THE SOUND WAVES BEING APPLIED ADJACENT THE BOTTOM OF THE VESSEL SO THAT THE VIBRATIONS IN THE VISOSE INDUCED THEREBY ORIGINATE AT THE BASE OF THE COLUMN OF VISCOSE COMPRISING THE HEAD.
Claim 2
Independent Claim
151 words
THE METHOD OF REMOVING GAS BUBBLES FROM VISCOSE WHICH COMPRISES CONTINUOUSLY FEEDING A STREAM OF VISCOSE CONTAINING GAS BUBBLES DOWNWARDLY THROUGH A VESSEL SUPPORTED IN A FIELD OF HIGH FREQUENCY SOUND WAVES HAVING A FREQUENCY BETWEEN 400,000 CYCLES PER SECOND AND 1,500,000 CYCLES PER SECOND, TO THEREBY SUBJECT ALL PORTIONS OF THE VISCOSE MOVING DOWNWARDLY THROUGH THE VESSEL SIMULTANEOUSLY TO THE ACTION OF THE SOUND WAVES, CONTINUOUSLY WITHDRAWING THE VISCOSE FROM THE VESSEL AND CORRELATING THE RATE FEED OF THE VISCOSE TO THE VESSEL SO THAT A HEAD OF DRAWAL THEREOF FROM THE VESSEL SO THAT A HEAD OF VISCOSE HAVING A SUBSTANTIALLY CONSTANT DEPTH AT LEAST TWOCE THE TRANVERSE DIMENSION OF THE VESSEL IS MAINTAINED IN THE VESSEL, THE SOUND WAVES BEING APPLIED ADJACENT THE BOTTOM OF THE VESSEL SO THAT THE VIBRATIONS IN THE VISOSE INDUCED THEREBY ORIGINATE AT THE BASE OF THE COLUMN OF VISCOSE COMPRISING THE HEAD.
References Cited (Backward Citations)
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Cited
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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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |