Patent US3280978A successfully refreshed from Google Patents.
US3280978A
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Assignee: IMO Industries Inc
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Filing: 1964-02-05
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Granted: 1966-10-25
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Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Winfield H Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:21
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/52; B01D29/62; B01D29/64; B01D29/6438; B01D29/66; B01D29/661; B01D29/88; B01D29/885; B01D35/00; B01D35/16; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A FILTERING PROCESS COMPRISING THE STEPS OF PASSING A LIQUID TO BE FILTERED THROUGH A FILTER TANK HAVING AT LEAST ONE TUBULAR VETICALLY EXTENDIGN SEPTUM THEREIN AND DEFINING AN INLET CHAMBER ON ONE SIDE OF SAID SEPTUM AND IN A LOWER PORTION OF SAID TANK AND AN OUTLET CHAMKBER ON THE OTHER SIDE OF SAID SEPTUM AND IN AN UPPER PORTION OF SAID TANK WHEREBY A FILTER CAKE IS BUILT UP ON THE INLET SIDE OF SAID SEPTUM DURING FILTERING, AND REMOVING THE FILTER CAKE ACCUMULATED ON SAID SEPTUM DURING FILTERING IN PREPARATION FOR A SUBSEQUENT FILTERING OPERATION, SAID REMOVAL OPERATION COMPRISING THE STEPS OF REMOVING AT LEAST A PORTION OF SAID LIQUID TO BE FILTERED FROM SAID INLET CHAMBER, INTRODUCING LIQUID INTO SAID OUTLET CHAMBER SO THAT SAID LIQUID FLOWS INTO THE INTERIOR
Claim 2
Dependent Claim
134 words
A FILTERING PROCESS COMPRISING THE STEPS OF PASSING A LIQUID TO BE FILTERED THROUGH A FILTER TANK HAVING AT LEAST ONE TUBULAR VETICALLY EXTENDIGN SEPTUM THEREIN AND DEFINING AN INLET CHAMBER ON ONE SIDE OF SAID SEPTUM AND IN A LOWER PORTION OF SAID TANK AND AN OUTLET CHAMKBER ON THE OTHER SIDE OF SAID SEPTUM AND IN AN UPPER PORTION OF SAID TANK WHEREBY A FILTER CAKE IS BUILT UP ON THE INLET SIDE OF SAID SEPTUM DURING FILTERING, AND REMOVING THE FILTER CAKE ACCUMULATED ON SAID SEPTUM DURING FILTERING IN PREPARATION FOR A SUBSEQUENT FILTERING OPERATION, SAID REMOVAL OPERATION COMPRISING THE STEPS OF REMOVING AT LEAST A PORTION OF SAID LIQUID TO BE FILTERED FROM SAID INLET CHAMBER, INTRODUCING LIQUID INTO SAID OUTLET CHAMBER SO THAT SAID LIQUID FLOWS INTO THE INTERIOR
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |