US3154465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaeration of washer filtrate
Assignee: Pullman Inc
•
Filing: 1961-05-02
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Granted: 1964-10-27
•
Expires: 1981-05-02
Abstract
No abstract record available.
Inventors
- 👤 William J Degnen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:48
CPC Classifications
D; D21; D21C; D21C9/00; D21C9/02; D21C9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR THE DEAERATION OF LIQUOR RECOVERED FROM PULP PRODUCED IN A CHEMICAL PULPING PROCESS WHICH COMPRISES PROVIDING A WASHER CONTAINING PULP RECOVERY DRUM, AND A FILTRATE RECOVERY DRUM, FLOWING THE FILTRATE FROM THE PULP RECOVERY DRUM INTO THE FILTRATE RECOVERY DRUM UNDER SUBATMOSPHERIC PRESSURE, GENERATING SAID SUBATMOSPHERIC PRESSURE BY IMPOSING A VACUUM ON SAID FILTRATE RECOVERY DRUM, DEAERATING THE FILTRATE IN SAID FILTRATE RECOVERY DRUM BY IMPOSING SONIC WAVE VIBRATIONS, AND WITHDRAWING DEAERATED LIQUOR FILTRATE FROM SAID FILTRATE RECOVERY DRUM.
Claim 2
Dependent Claim
82 words
A PROCESS FOR THE DEAERATION OF LIQUOR RECOVERED FROM PULP PRODUCED IN A CHEMICAL PULPING PROCESS WHICH COMPRISES PROVIDING A WASHER CONTAINING PULP RECOVERY DRUM, AND A FILTRATE RECOVERY DRUM, FLOWING THE FILTRATE FROM THE PULP RECOVERY DRUM INTO THE FILTRATE RECOVERY DRUM UNDER SUBATMOSPHERIC PRESSURE, GENERATING SAID SUBATMOSPHERIC PRESSURE BY IMPOSING A VACUUM ON SAID FILTRATE RECOVERY DRUM, DEAERATING THE FILTRATE IN SAID FILTRATE RECOVERY DRUM BY IMPOSING SONIC WAVE VIBRATIONS, AND WITHDRAWING DEAERATED LIQUOR FILTRATE FROM SAID FILTRATE RECOVERY DRUM.
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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |