US3149942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filters for gases
Assignee: Motors Liquidation Co
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Filing: 1961-01-10
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Granted: 1964-09-22
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Expires: 1981-01-10
Abstract
No abstract record available.
Inventors
- 👤 Finch Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:34
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/0033; Y; Y10; Y10S; Y10S55/00; Y10S55/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A SELF-SUPPORTING FILTER ELEMENT COMPRISING A MASS OF FOAM PLASTIC MATERIAL HAVING INTERCONNECTED CELLS, SAID FOAM MATERIAL BEING WETTED WITH A NON-DRYING OIL, SAID MASS TERMINATING IN AN IMPERMEABLE SKIN COMPLETELY ENCLOSING SAID MASS EXCEPT AT LOCATIONS THEREON WHICH CONSTITUTE AN INLET FOR GAS TO BE FILTERED AND AN OUTLET FOR FILTERED GAS, SAID SKIN SUPPORTING AND CONTAINING SAID MASS AND PROVIDING A CASING FOR SAID FILTER ELEMENT.
Claim 2
Dependent Claim
68 words
A SELF-SUPPORTING FILTER ELEMENT COMPRISING A MASS OF FOAM PLASTIC MATERIAL HAVING INTERCONNECTED CELLS, SAID FOAM MATERIAL BEING WETTED WITH A NON-DRYING OIL, SAID MASS TERMINATING IN AN IMPERMEABLE SKIN COMPLETELY ENCLOSING SAID MASS EXCEPT AT LOCATIONS THEREON WHICH CONSTITUTE AN INLET FOR GAS TO BE FILTERED AND AN OUTLET FOR FILTERED GAS, SAID SKIN SUPPORTING AND CONTAINING SAID MASS AND PROVIDING A CASING FOR SAID FILTER ELEMENT.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |