US3077987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of filtration by floating filter media
Assignee: Individual
•
Filing: 1958-10-22
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Granted: 1963-02-19
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Expires: 1978-10-22
Abstract
No abstract record available.
Inventors
- 👤 Morimoto Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:57
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4631; B01D24/002; B01D24/005; B01D24/02; B01D24/10; B01D24/12; B01D24/4605; B01D24/461
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF FILTRATION WHICH COMPRISES PROVIDING IN A CONFINED FILTRATION ZONE AN AMOUNT OF PARTICULATE FILTER MEDIA LESS THAN THE VOLUME OF SAID ZONE BUT SUFFICIENT TO FORM A STRATUM OF APPRECIABLE THICKNESS THEREIN, PASSING UPWARDLY THROUGH SAID ZONE LIQUID TO BE FILTERED HAVING A DENSITY GREATER THAN THAT OF SAID FILTER MEDIA, WHEREBY SAID MEDIA FORMS A COMPACT STRATUM FLOATING ADJACENT THE SURFACE OF THE LIQUID BEING FILTERED IN SAID ZONE, REMOVING THE LIQUID FROM SAID ZONE AFTER PASSAGE THROUGH THE MEDIA, AND PERIODICALLY DETACHING FROM THE BOTTOM OF THE STRATUM
Claim 2
Independent Claim
93 words
THE METHOD OF FILTRATION WHICH COMPRISES PROVIDING IN A CONFINED FILTRATION ZONE AN AMOUNT OF PARTICULATE FILTER MEDIA LESS THAN THE VOLUME OF SAID ZONE BUT SUFFICIENT TO FORM A STRATUM OF APPRECIABLE THICKNESS THEREIN, PASSING UPWARDLY THROUGH SAID ZONE LIQUID TO BE FILTERED HAVING A DENSITY GREATER THAN THAT OF SAID FILTER MEDIA, WHEREBY SAID MEDIA FORMS A COMPACT STRATUM FLOATING ADJACENT THE SURFACE OF THE LIQUID BEING FILTERED IN SAID ZONE, REMOVING THE LIQUID FROM SAID ZONE AFTER PASSAGE THROUGH THE MEDIA, AND PERIODICALLY DETACHING FROM THE BOTTOM OF THE STRATUM
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |