Patent US2789093A successfully refreshed from Google Patents.
US2789093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter adhesives
Assignee: California Research LLC
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Filing: 1953-09-28
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Granted: 1957-04-16
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Edward G Foehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:42
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; Y; Y10; Y10S; Y10S55/00; Y10S55/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A FILTER ADHESIVE HAVING ITS DESIRABLE PROPERTIES UNIMPAIRED BUT BEING SUBSTANTIALLY IMPROVED WITH RESPECT TO EASE OF APPLICATION AND EASE OF REMOVAL BY A SIMPLE WATER WASH, COMPRISING A MAJOR PROPORTION OF A HYDROCARBON OIL THICKENED TO THE CONSISTENCY OF A FILTER ADHESIVE WITH A THICKENING AGENT SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND PETROLEUM REFINED WAXES HAVING MELTING POINTS OF FROM 70* TO 140*C. AND HAVING INCORPORATED THEREIN FROM ABOUT 0.5% TO ABOUT 5%, BY WEIGHT, OF AN ALKYL PHENYL POLYOXYALKYLENE GLYCOL ETHER OF THE FORMULA:
Claim 2
Dependent Claim
88 words
A FILTER ADHESIVE HAVING ITS DESIRABLE PROPERTIES UNIMPAIRED BUT BEING SUBSTANTIALLY IMPROVED WITH RESPECT TO EASE OF APPLICATION AND EASE OF REMOVAL BY A SIMPLE WATER WASH, COMPRISING A MAJOR PROPORTION OF A HYDROCARBON OIL THICKENED TO THE CONSISTENCY OF A FILTER ADHESIVE WITH A THICKENING AGENT SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE AND PETROLEUM REFINED WAXES HAVING MELTING POINTS OF FROM 70* TO 140*C. AND HAVING INCORPORATED THEREIN FROM ABOUT 0.5% TO ABOUT 5%, BY WEIGHT, OF AN ALKYL PHENYL POLYOXYALKYLENE GLYCOL ETHER OF THE FORMULA:
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |