US2876097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum filters and method of production
Assignee: Purolator Products Inc
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Filing: 1957-03-28
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Granted: 1959-03-03
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Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 Fisher Elwyn Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2041; B01D39/2044; B01D39/2031; B01D39/2034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS OF PREPARING SINTERED ALUMINUM ELEMENTS COMPRISING THE STEPS OF COMPRESSING A MIXTURE OF ALUMINUM PARTICLES OF SMALL SIZE AND OF AN ALUMINUM PORE FORMER COMPOUND, INTO DESIRED SHAPES THEREBY FORMING "GREEN" COMPACTS PROVIDING AN ALUMINUM FLUX CONSISTING OF AN INTIMATE HOMOGENEOUS MIXTURE OF 70%-90% BY WEIGHT OF ALUMINUM TRICHLORIDE AND 30%-10% BY WEIGHT OF ALKALI METAL CHLORIDE, MELTING THIS FLUX AND HEATING THE MOLTEN FLUX TO AN ALUMINUM SINTERING TEMPERATURE OF FROM 500*-600*C., SUBMERGING THE "GREEN" COMPACTS IN THIS MOLTEN AND HEATED FLUX FOR A PERIOD OF FROM
Claim 2
Dependent Claim
90 words
A PROCESS OF PREPARING SINTERED ALUMINUM ELEMENTS COMPRISING THE STEPS OF COMPRESSING A MIXTURE OF ALUMINUM PARTICLES OF SMALL SIZE AND OF AN ALUMINUM PORE FORMER COMPOUND, INTO DESIRED SHAPES THEREBY FORMING "GREEN" COMPACTS PROVIDING AN ALUMINUM FLUX CONSISTING OF AN INTIMATE HOMOGENEOUS MIXTURE OF 70%-90% BY WEIGHT OF ALUMINUM TRICHLORIDE AND 30%-10% BY WEIGHT OF ALKALI METAL CHLORIDE, MELTING THIS FLUX AND HEATING THE MOLTEN FLUX TO AN ALUMINUM SINTERING TEMPERATURE OF FROM 500*-600*C., SUBMERGING THE "GREEN" COMPACTS IN THIS MOLTEN AND HEATED FLUX FOR A PERIOD OF FROM
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |