US4157358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated network polymers
Assignee: United States Department of the Navy
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Filing: 1978-10-13
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Granted: 1979-06-05
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Expires: 1998-10-13
Abstract
Abstract A random fluorinated polymer of the general equation: <IMAGE> wherein x is an integer from 1 to 4, y is an integer from 0 to 4, z is 1 or more, R' is selected from the group consisting of the 1,3 and the 1,4 isomers of -OC(CF3)2 phi C(CF3)2O-, R'' is selected from the group consisting of the cis and trans isomers of -O(CF3)2CCH2CH=CHC(CF3)2O-, and R is either R' or R''; and epoxy resins and urethane resins prepared therefrom.
Inventors
- 👤 Donald E. Field
- 👤 James R. Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/58; C08G18/582; C08G59/02; C08G59/04; C08G59/20; C08G59/22; C08G59/30; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
An urethane resin prepared from a polymer of the general formula: ##STR5## wherein x is an integer from 1 to 4, y is an integer from 1 to 4, z is greater than 10, R' is selected from the group consisting of the 1,3 and 1,4 isomers of --OC(CF 3 ) 2 φC(CF 3 ) 2 O--, R" is selected from the group consisting of the cis and trans isomers of --O(CF 3 ) 2 CCH 2 CH═CHC(CF 3 ) 2 O-- and R is either R' or R".
Claim 2
Dependent Claim
89 words
An urethane resin prepared from a polymer of the general formula: ##STR5## wherein x is an integer from 1 to 4, y is an integer from 1 to 4, z is greater than 10, R' is selected from the group consisting of the 1,3 and 1,4 isomers of --OC(CF 3 ) 2 φC(CF 3 ) 2 O--, R" is selected from the group consisting of the cis and trans isomers of --O(CF 3 ) 2 CCH 2 CH═CHC(CF 3 ) 2 O-- and R is either R' or R".
Claim 3
Dependent Claim
38 words
An urethane resin coating comprising said urethane resin of claim 1 and a fluorinated polymer selected from the class consisting of tetrafluoroethylene and fluoroethylenepropylene in an amount from more than zero to 55 weight percent of said coating.
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) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |