US3787467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluoro-alkane-sulphonamido substituted organo-silicon compounds and their production
Assignee: Bayer AG
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Filing: 1972-01-25
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Granted: 1974-01-22
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Expires: 1992-01-25
Abstract
Abstract CNF(2N+1)-SO2-N(-R)-M IN WHICH M IS A HYDROGEN ATOM OR AN ALKALI METAL ATOM, AT A TEMPERATURE OF BETWEEN 20 AND 200*C., AND IN THE CASE, WHERE M IS A HYDROGEN ATOM IN THE PRESENCE OF A TERTIARY NITROGEN BASE. THE PRODUCTS ARE SUITABLE AS OIL-, DIRT- AND WATER-REPELLENT COATING AGENTS. WHEREIN N IS AN INTEGER FROM 1 TO 18 AND R IS A HYDROGEN ATOM OR A HYDROCARBON RACIAL ARE PRODUCED BY REACTING A HALOMETHYL ORGANO-OXY SILANE OR A HALOMETHYL-SUBSTITUTED ORGANO-POLYSILOXANE WITH A PERFLUORO-ALKANE-SULPHONAMIDE OF THE GENERAL FORMULA CNF(2N+1)-SO2-N(-R)-CH2- NOVEL ORGANO-OXYSILAMES AND ORGANO-POLYSILOXANES HAVING AT LEAST ONE SI-BONDED SUBSTITUENT OF THE GENERAL FORMULA
Inventors
- 👤 H Niederprum
- 👤 W Buchner
- 👤 K Friederich
- 👤 H Lucking
- 👤 W Noll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C04B41/4944; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/18; C07F7/1804; C08G77/04; C08G77/38; C08G77/382; C08G77/392
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |