US3632843A
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Bis(perfluoroalkylsulfonyl)methanes in cationic polymerization
Assignee: 3M Co
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Filing: 1969-03-14
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Granted: 1972-01-04
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Expires: 1989-03-14
Abstract
Abstract BIS(PERFLUOROALKYLSULFONYL) METHANES IN ACTIVE OR LATENT FORM (AS FREE ACIDS OR LATENT AMINO OR AMMONIUM SALTS OR AS CLATHRATES) ARE USED AS CATALYST IN THE CURING OR POLYMERIZATION OF CATIONIC SENSITIVE MONOMERS, SUCH AS EPOXIDES, VINYL ETHERS, N-VINYL COMPOUNDS, AZIRIDINES, AND ACETALS.
Inventors
- 👤 Michael George Allen
- 👤 George W Beebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:39
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/028; C08F; C08F4/00; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4064; C08G59/44; C08G59/444; C08G59/68; C08G59/687; C08G65/00; C08G65/02; C08G65/26; C08G65/2642; C08G65/2645; C08G65/2648; C08G65/2669; C08G65/2684
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |