US2585385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitating tower
Assignee: Mathieson Chemical Corp
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Filing: 1948-07-09
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Granted: 1952-02-12
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Expires: 1968-07-09
Abstract
No abstract record available.
Inventors
- 👤 John F Haller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/22; B01J8/224; B01J8/226; B01J2219/00; B01J2219/00761; B01J2219/00763; B01J2219/00765; B01J2219/0077; B01J2219/00772
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN APPARATUS OF THE TYPE DESCRIBED WHICH COMPRISES A VERTICALLY ELONGATED, CLOSED, CYLINDRICAL CHAMBER HAVING A GAS INLET AT THE LOWER END THEREOF AND A GAS OUTLET AT THE UPPER END THEREOF, AND A HELICAL FLATTENED MEMBER DISPOSED WITHIN A CYLINDRICAL CHAMBER, THE OUTER EDGE OF THE HELICAL MEMBER BEING IN FIXED CONTINUOUS CONTACT WITH THE INNER SURFACE OF SAID CHAMBER, THE WIDTH OF THE HELICAL MEMBER BEING LESS THAN THE RADIUS OF THE CYLINDRICAL CHAMBER WHEREBY AN UNOBSTRUCTED VERTICAL CENTRAL PASSAGE THROUGHOUT THE
Claim 2
Independent Claim
84 words
AN APPARATUS OF THE TYPE DESCRIBED WHICH COMPRISES A VERTICALLY ELONGATED, CLOSED, CYLINDRICAL CHAMBER HAVING A GAS INLET AT THE LOWER END THEREOF AND A GAS OUTLET AT THE UPPER END THEREOF, AND A HELICAL FLATTENED MEMBER DISPOSED WITHIN A CYLINDRICAL CHAMBER, THE OUTER EDGE OF THE HELICAL MEMBER BEING IN FIXED CONTINUOUS CONTACT WITH THE INNER SURFACE OF SAID CHAMBER, THE WIDTH OF THE HELICAL MEMBER BEING LESS THAN THE RADIUS OF THE CYLINDRICAL CHAMBER WHEREBY AN UNOBSTRUCTED VERTICAL CENTRAL PASSAGE THROUGHOUT THE
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |