US2834767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers and method of preparation thereof
Assignee: 3M Co
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Filing: 1955-01-26
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Granted: 1958-05-13
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Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 John M Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:46
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/186; C08F214/188; C08F16/00; C08F16/12; C08F16/14; C08F16/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A COPOLYER OF A VINYL ALKYL ETHER HAVING ONE TO EIGHT CARBON ATOMS IN THE ALKYL GROUP AND IN WHICH SAID ALKYL GROUP IS SELECTED FROM THE GROUP CONSISTING OF AN UNSUBSTITUTED ALKYL RADICAL, A CHLOROALKYL RADICAL AND AN ALKOXY-SUBSTITUTED ALKYL RADICAL, AND DICHLORODIFLUOROETHYLENE AS THE REMAINING MAJOR MONOMERIC CONSTITUENT.
Claim 2
Dependent Claim
69 words
A PROCESS WHICH COMPRISES COPOLYMERIZING A MONOMERIC MIXTURE OF A VINYL ALKYL ETHER HAVING ONE TO EIGHT CARBON ATOMS IN THE ALKYL GROUP AND IN WHICH SAID ALKYL GROUP IS SELECTED FROM THE GROUP CONSISTING OF AN UNSUBSTITUTED ALKYL RADICAL, A CHLOROALKYL RADICAL AND AN ALKOXY-SUBSTITUTED ALKYL RADICAL, AND DICHLORODIFLUOROETHYLENE AS THE REMAINING MAJOR MONOMERIC COMPONENT OF SAID MONOMERIC MIXTURE AT A TEMPERATURE BETWEEN ABOUT -30*C. AND ABOUT 150*C.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |