Patent US2857355A successfully refreshed from Google Patents.
US2857355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene-estersil composition
Assignee: EIDP Inc
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Filing: 1953-10-27
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Granted: 1958-10-21
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Expires: 1973-10-27
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Iler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:00
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A COMPOSITION COMPRISING POLYETHYLENE AND, DISPERSED THEREIN, AN ESTERSIL WHICH IS ORGANOPHILIC, BEING PREFERENTIALLY WETTED BY BUTANOL IN A BUTANOL-WATER MIXTURE, THE ESTERSIL COMPRISING A SUPERCOLLOIDAL SUBSTRATE COATED WITH -OR GROUPS, THE SUBSTRATE HAVING A SURFACE OF SILICA AND HAVING A SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM, THE COATING OF -OR GROUPS BEING CHEMICALLY BOUND TO SAID SILICA, R BEING A HYDROCARBON RADICAL OF FROM 2 TO 18 CARBON ATOMS WHEREIN THE CARBON ATOM ATTACHED TO OXYGEN IS ALSO ATTACHED TO HYDROGEN, SAID ESTERSIL BEING PRESENT IN A MINOR AMOUNT BASED ON THE TOTAL WEIGHT OF POLYETHYLENE AND ESTERSIL.
Claim 2
Dependent Claim
105 words
A COMPOSITION COMPRISING POLYETHYLENE AND, DISPERSED THEREIN, AN ESTERSIL WHICH IS ORGANOPHILIC, BEING PREFERENTIALLY WETTED BY BUTANOL IN A BUTANOL-WATER MIXTURE, THE ESTERSIL COMPRISING A SUPERCOLLOIDAL SUBSTRATE COATED WITH -OR GROUPS, THE SUBSTRATE HAVING A SURFACE OF SILICA AND HAVING A SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM, THE COATING OF -OR GROUPS BEING CHEMICALLY BOUND TO SAID SILICA, R BEING A HYDROCARBON RADICAL OF FROM 2 TO 18 CARBON ATOMS WHEREIN THE CARBON ATOM ATTACHED TO OXYGEN IS ALSO ATTACHED TO HYDROGEN, SAID ESTERSIL BEING PRESENT IN A MINOR AMOUNT BASED ON THE TOTAL WEIGHT OF POLYETHYLENE AND ESTERSIL.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |