US3071565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linking of polymers
Assignee: 3M Co
•
Filing: 1959-12-21
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Granted: 1963-01-01
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Horace R Davis
- 👤 Francis J Honn
- 👤 Charles B Griffis
- 👤 Juan C Montermoso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR CROSS-LINKING A LINEAR ELASTOMERIC COPOLYMER OF TRIFLUOROCHYLOROETHYLENE AND VINYLIDENE FLUORIDE WHICH COMPRISES UNIFORMLY ADMIXING SUCH A COPOLYMER CONTAINING 20 TO 69 MOL PERCENT TRIFLUORCHLOROETHYLENEE WITH A POLYIISOCYANATE IN THE PRESENCE OF MOISTURE, MAINTAINING THE TEMPERATURE DURING MIXING NOT HIGHER THAN 150*F. AND THEREAFTER FABRICATING THE ADMIXTURE INTO THE DESIRED FORM WHILE SIMULTANEOUSLY HEATING SAID ADMIXTURE TO A TEMPERATURE ABOVE 150*F. TO CAUSE CROSSLINKIING OF SAID LINEAR COPOLYMER DURING SAID FABRICATION.
Claim 2
Dependent Claim
73 words
A PROCESS FOR CROSS-LINKING A LINEAR ELASTOMERIC COPOLYMER OF TRIFLUOROCHYLOROETHYLENE AND VINYLIDENE FLUORIDE WHICH COMPRISES UNIFORMLY ADMIXING SUCH A COPOLYMER CONTAINING 20 TO 69 MOL PERCENT TRIFLUORCHLOROETHYLENEE WITH A POLYIISOCYANATE IN THE PRESENCE OF MOISTURE, MAINTAINING THE TEMPERATURE DURING MIXING NOT HIGHER THAN 150*F. AND THEREAFTER FABRICATING THE ADMIXTURE INTO THE DESIRED FORM WHILE SIMULTANEOUSLY HEATING SAID ADMIXTURE TO A TEMPERATURE ABOVE 150*F. TO CAUSE CROSSLINKIING OF SAID LINEAR COPOLYMER DURING SAID FABRICATION.
References Cited (Backward Citations)
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Cited
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Cited
GB604834A
Cited
FR979824A
Cited
US2577381A
Cited
US2793200A
Cited
US2979490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |