US3575940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorocarbon compounds and polymers thereof
Assignee: Daikin Industries Ltd
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Filing: 1968-01-04
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Granted: 1971-04-20
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Expires: 1988-01-04
Abstract
Abstract FLUOROCARBON COMPOUNDS HAVING THE FORMULA: R1CH2CH(CH2)MO C C R (CH2)PO OC(CH2)ACR''=CH2 WHEREIN RF IS A PERFLUOROALKYL GROUP HAVING 3 TO 21 CARBON ATOMS, R IS AN ALKYL GROUP HVING 1 TO 18 CARBON ATOMS, R'' IS ONE MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND METHYL GROUP, M IS AN INTEGER OF FROM 0 TO 10, P IS AN INTEGER OF FROM 0 TO 10 WHEN M IS 0 AND P IS 0 WHEN M IS 1 TO 10, AND N IS AN INTEGER OF FROM 0 TO 10, AND POLYMERS DERIVED THEREFROM.
Inventors
- 👤 Atsuo Katsushima
- 👤 Iwao Hisamoto
- 👤 Shoshin Fukui
- 👤 Takahisa Kato
- 👤 Masayuki Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31634; Y10T428/31645; Y10T428/31649; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |