US3335862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple shell filters
Assignee: Individual
•
Filing: 1964-02-28
•
Granted: 1967-08-15
•
Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Hirs Gene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:09
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/50; B01D29/52; B01D29/76; B01D29/80; B01D29/84; B01D29/843; B01D29/88; B01D29/90; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
IN A METHOD OF FILTERING CONTAMINANTS FROM A FLUID IN WHICH SUCH CONTAMINANTS ARE SUSPENDED, THE STEPS OF CONTACTING THE OPPOSING SURFACES OF A MEDIAL SHELL WITH SEPARATE FILTER MEDIA, CLAMPING SAID MEDIA TO SAID SURFACES IN SEALED RELATION THERETO BY A PAIR OF SPACED OUTER SHELLS, FLOWING FLUID FROM SAID MEDIAL SHELL THROUGH SAID MEDIA AND INTO SAID OUTER SHELLS TO ACCRETE CONTAMINANTS ON THE FACING SURFACES OF SAID MEDIA, RESPECTIVELY, RELEASING SAID MEDIA FROM SAID SEALED RELATION, AND JOINTLY REMOVING SAID MEDIA WITH SAID CONTAMINANTS CONFINED THEREBETWEEN.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |