Patent US2685565A successfully refreshed from Google Patents.
US2685565A
Expired / Lapsed
US
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Filtering and cleaning means
Assignee: R M HOLLINGSHEAD CORP
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Filing: 1949-11-05
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Granted: 1954-08-03
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Lerroy V Jones
- 👤 Stanley J Willis
- 👤 Manley M Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:13
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/02; B01D24/04; B01J; B01J47/00; B01J47/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A FILTER FOR USE IN FILTERING COOLANT LIQUIDS IN CONTACT WITH FERROUS SURFACES, COMPRISING A FILTER HOUSING, A METALLIC MEMBER IN THE HOUSING, SAID METALLIC MEMBER BEING ELECTRICALLY CONNECTED TO THE FERROUS MATERIAL AND BEING FORMED OF A METAL HIGH IN THE ELECTRO-CHEMICAL SERIES WITH RESPECT TO IRON AND CONSTITUTING AN ANODE IN CONTACT WITH THE COOLING LIQUID, A FILTER CATRIDGE SUPPORTED IN THE HOUSING WHEREBY FLUID PASSING THROUGH THE HOUSING PASSES THROUGH THE CARTRIDGE, SAID CARTRIDGE CONTAINING MATERIAL CONSTITUTING A MECHANICAL FILTER AND CONTAINING FILM FORMING REAGENTS INCLUDING APPROXIMATELY EQUAL PARTS BY WEIGHT OF SODIUM NITRITE AND SODIUM CHROMATE.
Claim 2
Dependent Claim
100 words
A FILTER FOR USE IN FILTERING COOLANT LIQUIDS IN CONTACT WITH FERROUS SURFACES, COMPRISING A FILTER HOUSING, A METALLIC MEMBER IN THE HOUSING, SAID METALLIC MEMBER BEING ELECTRICALLY CONNECTED TO THE FERROUS MATERIAL AND BEING FORMED OF A METAL HIGH IN THE ELECTRO-CHEMICAL SERIES WITH RESPECT TO IRON AND CONSTITUTING AN ANODE IN CONTACT WITH THE COOLING LIQUID, A FILTER CATRIDGE SUPPORTED IN THE HOUSING WHEREBY FLUID PASSING THROUGH THE HOUSING PASSES THROUGH THE CARTRIDGE, SAID CARTRIDGE CONTAINING MATERIAL CONSTITUTING A MECHANICAL FILTER AND CONTAINING FILM FORMING REAGENTS INCLUDING APPROXIMATELY EQUAL PARTS BY WEIGHT OF SODIUM NITRITE AND SODIUM CHROMATE.
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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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |