Patent US4478482A successfully refreshed from Google Patents.
Patent US2735508A successfully refreshed from Google Patents.
US2735508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
krieble
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:03
CPC Classifications
B; B01; B01D; B01D50/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A GAS CLEANING DEVICE, THE COMBINATION OF MEANS FORMING AN ELONGATED CYLINDRICAL CONTAINER CLOSED AT ONE END AND OPEN AT THE OTHER, A PARTITION HAVING AN OPENING THEREIN FASTENED ACROSS SAID CONTAINER, MEANS FORMING AN INLET BETWEEN SAID PARTITION AND SAID CLOSED END, A POROUS HYDROPHOBIC MEMBRANE, A MEMBER HAVING AN OPENING THEREIN ATTACHED TO SAID MEMBRANE, MEANS TO FASTEN SAID MEMBER IN THE OPENING OF SAID PARTITION FROM THE OPEN END OF SAID CONTAINER WHEREBY GAS FLOWING THROUGH SAID INLET MUST PASS THROUGH SAID MEMBRANE AND MEMBER TO PASS SAID PARTITION, MEANS FORMING A LEDGE AROUND THE INSIDE OF SAID CONTAINER BETWEEN THE PARTITION AND THE OPEN END THEREOF, A CYLINDRICAL CANISTER ADAPTED TO HOLD AN ADSORBING MATERIAL AND HAVING PERFORATED ENDS RECEIVED IN THE OPEN END OF SAID CONTAINER AND RESTING AGAINST SAID LEDGE, SEALING MEANS BETWEEN SAID CANISTER AND LEDGE,
Claim 2
Dependent Claim
144 words
IN A GAS CLEANING DEVICE, THE COMBINATION OF MEANS FORMING AN ELONGATED CYLINDRICAL CONTAINER CLOSED AT ONE END AND OPEN AT THE OTHER, A PARTITION HAVING AN OPENING THEREIN FASTENED ACROSS SAID CONTAINER, MEANS FORMING AN INLET BETWEEN SAID PARTITION AND SAID CLOSED END, A POROUS HYDROPHOBIC MEMBRANE, A MEMBER HAVING AN OPENING THEREIN ATTACHED TO SAID MEMBRANE, MEANS TO FASTEN SAID MEMBER IN THE OPENING OF SAID PARTITION FROM THE OPEN END OF SAID CONTAINER WHEREBY GAS FLOWING THROUGH SAID INLET MUST PASS THROUGH SAID MEMBRANE AND MEMBER TO PASS SAID PARTITION, MEANS FORMING A LEDGE AROUND THE INSIDE OF SAID CONTAINER BETWEEN THE PARTITION AND THE OPEN END THEREOF, A CYLINDRICAL CANISTER ADAPTED TO HOLD AN ADSORBING MATERIAL AND HAVING PERFORATED ENDS RECEIVED IN THE OPEN END OF SAID CONTAINER AND RESTING AGAINST SAID LEDGE, SEALING MEANS BETWEEN SAID CANISTER AND LEDGE,
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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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |