US3307335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filter
Assignee: Individual
•
Filing: 1965-03-24
•
Granted: 1967-03-07
•
Expires: 1985-03-24
Abstract
No abstract record available.
Inventors
- 👤 Frank A Shomaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A GAS FILTER COMPRISING A CYLINDRICAL CONTAINER HAVING A REMOVABLE COVER, SAID CONTAINER BEING SUBDIVIDED INTO UPPER AND LOWER CHAMBERS BY A HORIZONTAL WALL HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED OPENINGS THEREIN, EACH OF SAID OPENINGS BEING SURROUNDED BY AN UPSTANDING ANNULAR RETAINING RING, A PLURALITY OF CYLINDRICAL POROUS FILTER BLOCKS EACH BEING SEATED WITHIN A RESPECTIVE RETAINER RING TO PLACE ONLY THE LOWER SURFACE OF EACH BLOCK IN COMMUNICATION WITH THE INTERIOR OF THE LOWER CHAMBER, A TANGENTIAL INLET FOR SAID LOWER CHAMBER, AN OUTLET CONDUIT HAVING A VERTICAL INLET PORTION EXTENDING UPWARDLY IN COMMUNICATION WITH THE INTERIOR OF THE UPPER CHAMBER THROUGH THE CENTER OF SAID HORIZONTAL WALL, AND PASSING DOWNWARDLY THROUGH THE LOWER CHAMBER IN HEAT-EXCHANGING RELATIONSHIP WITH ENTERING GAS, A CLAMPING PLATE, MEANS FOR SUPPORTING THE PLATE IN DOWNWARDLY CLAMPING ENGAGEMENT WITH THE UPPER ENDS OF THE FILTER BLOCKS.
Claim 2
Dependent Claim
143 words
A GAS FILTER COMPRISING A CYLINDRICAL CONTAINER HAVING A REMOVABLE COVER, SAID CONTAINER BEING SUBDIVIDED INTO UPPER AND LOWER CHAMBERS BY A HORIZONTAL WALL HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED OPENINGS THEREIN, EACH OF SAID OPENINGS BEING SURROUNDED BY AN UPSTANDING ANNULAR RETAINING RING, A PLURALITY OF CYLINDRICAL POROUS FILTER BLOCKS EACH BEING SEATED WITHIN A RESPECTIVE RETAINER RING TO PLACE ONLY THE LOWER SURFACE OF EACH BLOCK IN COMMUNICATION WITH THE INTERIOR OF THE LOWER CHAMBER, A TANGENTIAL INLET FOR SAID LOWER CHAMBER, AN OUTLET CONDUIT HAVING A VERTICAL INLET PORTION EXTENDING UPWARDLY IN COMMUNICATION WITH THE INTERIOR OF THE UPPER CHAMBER THROUGH THE CENTER OF SAID HORIZONTAL WALL, AND PASSING DOWNWARDLY THROUGH THE LOWER CHAMBER IN HEAT-EXCHANGING RELATIONSHIP WITH ENTERING GAS, A CLAMPING PLATE, MEANS FOR SUPPORTING THE PLATE IN DOWNWARDLY CLAMPING ENGAGEMENT WITH THE UPPER ENDS OF THE FILTER BLOCKS.
References Cited (Backward Citations)
US2056755A
Cited
FR412850A
Cited
FR778179A
Cited
US2096484A
Cited
FR978018A
Cited
FR1040686A
Cited
US2984361A
Cited
FR1121854A
Cited
US2919030A
Cited
GB860698A
Cited
US3124443A
Cited
US3093469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |