US3135592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of gases with a liquidwashed filter
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1959-02-16
•
Granted: 1964-06-02
•
Expires: 1979-02-16
Abstract
No abstract record available.
Inventors
- 👤 Fairs Geoffrey Lowrie
- 👤 Plaut Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S261/00; Y10S261/72; Y10S55/00; Y10S55/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A LIQUID WASHED FILTER FOR THE REMOVAL OF FINE PARTICLES FROM GAS AND VAPORS COMPRISING A FIBER FILTER WHEREIN THE FILTER IS COMPOSED OF A NON-WOVEN MASS OF SEPARATE AND INDIVIDUAL "NON-WETTABLE" FIBERS HAVING DIAMETERS ESSENTIALLY IN THE RANGE 5U TO 50U, A "NONWETTABLE" FIBER BEING DEFINED AS ONE WHEREON THE FINE PARTICLES CAN BE DEPOSITED SUBSTANTIALLY COMPLETELY IN THE FORM OF DISCRETE DROPLETS HELD ON THE SURFACE, OF, BUT NOT SURROUNDING THE FIBERS, THE SPACES BETWEEN THE DROPLETS BEING SUBSTANTIALLY FREE FROM FILM-LIKE DEPOSITS; MEANS FOR FLOWING GASES AND VAPORS CARRYING THE FINE PARTICLES THROUGH THE FILTER; AND MEANS FOR CONTINUOUSLY WASHING THE FINE PARTICLES FROM THE FILTER WITH A LIQUID AS GASES AND VAPORS PASS THERETHROUGH.
Claim 2
Dependent Claim
118 words
A LIQUID WASHED FILTER FOR THE REMOVAL OF FINE PARTICLES FROM GAS AND VAPORS COMPRISING A FIBER FILTER WHEREIN THE FILTER IS COMPOSED OF A NON-WOVEN MASS OF SEPARATE AND INDIVIDUAL "NON-WETTABLE" FIBERS HAVING DIAMETERS ESSENTIALLY IN THE RANGE 5U TO 50U, A "NONWETTABLE" FIBER BEING DEFINED AS ONE WHEREON THE FINE PARTICLES CAN BE DEPOSITED SUBSTANTIALLY COMPLETELY IN THE FORM OF DISCRETE DROPLETS HELD ON THE SURFACE, OF, BUT NOT SURROUNDING THE FIBERS, THE SPACES BETWEEN THE DROPLETS BEING SUBSTANTIALLY FREE FROM FILM-LIKE DEPOSITS; MEANS FOR FLOWING GASES AND VAPORS CARRYING THE FINE PARTICLES THROUGH THE FILTER; AND MEANS FOR CONTINUOUSLY WASHING THE FINE PARTICLES FROM THE FILTER WITH A LIQUID AS GASES AND VAPORS PASS THERETHROUGH.
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |