Patent US3149072A successfully refreshed from Google Patents.
US3149072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid clarification apparatus
Assignee: Individual
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Filing: 1962-10-30
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Granted: 1964-09-15
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Silverman Ira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A DIATOMACEOUS EARTH FILTER, WHEREIN THE NUMBER OF SQUARE FEET OF FILTER SURFACE CAN BE VARIED OVER A WIDE RANGE, COMPRISING A TANK; A FORAMINOUS INTERNAL HEADER PLATE MOUNTED IN SAID TANK DEFINING AN INLET ZONE AND A DISCHARGE ZONE; A PLURALITY OF PARALLEL NIPPLES MOUNTED ON SAID HEADER PLATE IN REGISTRATION WITH ITS FORAMINA AND EXTENDING INTO SAID INLET ZONE TO PROVIDE LIQUID COMMUNICATION BETWEEN SAID INLET ZONE AND SAID DISCHARGE ZONE; AN INLET PERMITTING LIQUID TO FLOW INTO SAID INLET ZONE; AN OUTLET PERMITTING LIQUID TO FLOW FROM SAID DISCHARGE ZONE; A BAFFLE PROXIMATE SAID INLET; A PLURALITY OF CYLINDRICAL FILTER ELEMENTS MOUNTED ON SOME OF SAID NIPPLES PARALLEL TO EACH OTHER AND EXTENDING LONGITUDINALLY INTO SAID INLET ZONE; CAPS REMOVABLY MOUNTED ON THOSE NIPPLES NOT HAVING FILTER ELEMENTS COMPRISING A PLUJRALITY OF STACKED LATTICED MODULES, EACH MODULE INCLUDING A THIN FLAT HORIZONTAL RING AND INTEGRAL LONGITUDINALLY EXTENDING TUBULAR
Claim 2
Dependent Claim
151 words
A DIATOMACEOUS EARTH FILTER, WHEREIN THE NUMBER OF SQUARE FEET OF FILTER SURFACE CAN BE VARIED OVER A WIDE RANGE, COMPRISING A TANK; A FORAMINOUS INTERNAL HEADER PLATE MOUNTED IN SAID TANK DEFINING AN INLET ZONE AND A DISCHARGE ZONE; A PLURALITY OF PARALLEL NIPPLES MOUNTED ON SAID HEADER PLATE IN REGISTRATION WITH ITS FORAMINA AND EXTENDING INTO SAID INLET ZONE TO PROVIDE LIQUID COMMUNICATION BETWEEN SAID INLET ZONE AND SAID DISCHARGE ZONE; AN INLET PERMITTING LIQUID TO FLOW INTO SAID INLET ZONE; AN OUTLET PERMITTING LIQUID TO FLOW FROM SAID DISCHARGE ZONE; A BAFFLE PROXIMATE SAID INLET; A PLURALITY OF CYLINDRICAL FILTER ELEMENTS MOUNTED ON SOME OF SAID NIPPLES PARALLEL TO EACH OTHER AND EXTENDING LONGITUDINALLY INTO SAID INLET ZONE; CAPS REMOVABLY MOUNTED ON THOSE NIPPLES NOT HAVING FILTER ELEMENTS COMPRISING A PLUJRALITY OF STACKED LATTICED MODULES, EACH MODULE INCLUDING A THIN FLAT HORIZONTAL RING AND INTEGRAL LONGITUDINALLY EXTENDING TUBULAR
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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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |