Patent US2739077A successfully refreshed from Google Patents.
US2739077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product and process
Assignee: EIDP Inc
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Filing: 1952-03-06
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Granted: 1956-03-20
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Expires: 1972-03-06
Abstract
No abstract record available.
Inventors
- 👤 Max T Goebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:24
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A SOLID CONSISTING ESSENTIALLY OF SUBSTRATE PARTICLES OF INORGANIC SILICEOUS MATERIAL HAVING AN AVERAGE SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM HAVING AN AVERAGE PARTICLE DIAMETER GREATER THAN ABOUT 1 MILLIMICRON, AND HAVING CHEMICALLY BOUND TO THE SILICON ATOMS ON THE SURFACE OF SAID PARTICLES AT LEAST 50 -OCH2(CF2)NX GROUP PER 100 SQUARE MILLIMICRONS OF SURFACE AREA OF THE SILICEOUS MATERIAL, WHERE X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND FLUORINE AND N IS AN INTEGER OF FROM 1 TO 17.
Claim 2
Dependent Claim
89 words
A SOLID CONSISTING ESSENTIALLY OF SUBSTRATE PARTICLES OF INORGANIC SILICEOUS MATERIAL HAVING AN AVERAGE SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM HAVING AN AVERAGE PARTICLE DIAMETER GREATER THAN ABOUT 1 MILLIMICRON, AND HAVING CHEMICALLY BOUND TO THE SILICON ATOMS ON THE SURFACE OF SAID PARTICLES AT LEAST 50 -OCH2(CF2)NX GROUP PER 100 SQUARE MILLIMICRONS OF SURFACE AREA OF THE SILICEOUS MATERIAL, WHERE X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND FLUORINE AND N IS AN INTEGER OF FROM 1 TO 17.
Claim 3
Dependent Claim
161 words
A PROCESS WHICH COMPRISES THE STEP OF CHEMICALLY REACTING AN ALCOHOL OF THE FORMULA X(CF2)NCH2OH WHERE X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND FLUORINE AND N IS AN INTEGER OF FROM 1 TO 17, WITH AN INORGANIC SILICEOUS MATERIAL IN A SUPERCOLLOIDAL STATE OF SUBDIVISION, HAVING AN AVERAGE SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM HAVING AN AVERAGE PARTICLE DIAMETER GREATER THAN ABOUT 1 MILLIMICRON, AND HAVING A REACTIVE SURFACE CONTAINING GROUPS SELECTED FROM THE CLASS CONSISTING OF SILANOL AND HEAT-ACTIVATED SILICONOXYGEN GROUPS, WHILE MAINTAING THE WATER CONTENT OF THE SYSTEM BELOW ABOUT 5 PER CENT BY WEIGHT OF THE ALCOHOL IN THE SYSTEM AND THE TEMPERATURE IN THE RANGE FROM 100*C. TO THE THERMAL DECOMPOSITION TEMPERATURE OF THE ALCOHOL UNTIL AT LEAST 50 -OCH2(CF2)NX GROUPS, WHERE X AND N HAVE THE SAME SIGNIFICANE AS ABOVE, PER 100 SQUARE MILLIMICRONS OF SURFACE AREA OF SAID INORGANIC SILICEOUS SOLID ARE CHEMICALLY BOUND THERETO.
Claim 4
Dependent Claim
161 words
A PROCESS WHICH COMPRISES THE STEP OF CHEMICALLY REACTING AN ALCOHOL OF THE FORMULA X(CF2)NCH2OH WHERE X IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND FLUORINE AND N IS AN INTEGER OF FROM 1 TO 17, WITH AN INORGANIC SILICEOUS MATERIAL IN A SUPERCOLLOIDAL STATE OF SUBDIVISION, HAVING AN AVERAGE SPECIFIC SURFACE AREA OF FROM 1 TO 900 SQUARE METERS PER GRAM HAVING AN AVERAGE PARTICLE DIAMETER GREATER THAN ABOUT 1 MILLIMICRON, AND HAVING A REACTIVE SURFACE CONTAINING GROUPS SELECTED FROM THE CLASS CONSISTING OF SILANOL AND HEAT-ACTIVATED SILICONOXYGEN GROUPS, WHILE MAINTAING THE WATER CONTENT OF THE SYSTEM BELOW ABOUT 5 PER CENT BY WEIGHT OF THE ALCOHOL IN THE SYSTEM AND THE TEMPERATURE IN THE RANGE FROM 100*C. TO THE THERMAL DECOMPOSITION TEMPERATURE OF THE ALCOHOL UNTIL AT LEAST 50 -OCH2(CF2)NX GROUPS, WHERE X AND N HAVE THE SAME SIGNIFICANE AS ABOVE, PER 100 SQUARE MILLIMICRONS OF SURFACE AREA OF SAID INORGANIC SILICEOUS SOLID ARE CHEMICALLY BOUND THERETO.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |