US3333693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering method and apparatus
Assignee: Individual
•
Filing: 1964-11-13
•
Granted: 1967-08-01
•
Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 Hirs Gene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:36
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
155 words
IN A METHOD OF FILTERING CONTAMINANT PARTICLES FROM A LIQUID, THE STEPS OF INTERPOSING A LIQUID PERMEABLE FILTER MEDIUM BETWEEN THE SPACED CONFRONTING OPEN FACES OF A PAIR OF LIQUID CONDUCTING SHELLS, TELESCOPING A HOLLOW SEAL FRAME OVER ONE OF SAID SHELLS IN A FIRST DIRECTION TOWARD SAID MEDIUM, PERIPHERALLY CONFINING SAID MEDIUM BETWEEN A PERIMETRIC ELASTOMERIC SEAL CARRIED BY SAID FRAME AND A PERIMETRIC SEALING LEDGE ON THE OTHER OF SAID SHELLS, SEALING SAID FRAME TO SAID ONE SHELL, INTRODUCING CONTAMINATED LIQUID UNDER PRESSURE INTO ONE OF SAID SHELLS, EXPOSING A SURFACE OF SAID SEAL FRAME TO THE PRESSURE OF SAID CONTAMINATED LIQUID SO THAT THE PRESSURE URGES SAID SEAL FRAME INTO ENGAGEMENT WITH SAID FILTER MEDIUM AND SAID SEALING LEDGE, FLOWING LIQUID THROUGH SAID MEDIUM TO ACCRETE CONTAMINANT PARTICLES THEREON, REMOVING FILTRATE LIQUID THROUGH THE OTHER OF SAID SHELLS, INTERRUPTING THE FLOW OF LIQUID INTO THE ONE SHELL IN RESPONSE TO A PREDETER-
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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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |