US3645990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated oil- and water-repellent and dry soil resistant polymers
Assignee: EIDP Inc
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Filing: 1970-01-29
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Granted: 1972-02-29
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Expires: 1990-01-29
Abstract
Abstract FLUORINATED OIL-AND WATER-REPELLENT AND DRY SOIL RESISTANT AQUEOUS EMULSION POLYMERS CONTAINING UNITS DERIVED FROM ONOMERS HAVING THE STRUCTURE R1CH2CH2O2CC(CH3)=CH2 WHEREIN RF IS A PERFLUORALKYL GROUP OF ABUT 4 THROUGH 14 CARBON ATOMS, AND METHYL ACRYLATE OR ETHYL ACRYLATE, AND OPTIONALLY CONTAINING SAMLL AMOUNTS OF UNITS DERIVED FROM ONOMERS SELECTED FROM CH2=CRCONHCH2OH, CH=CRCO2CH2-CH2OH AND MIXTURES THEREOF WHEREIN R IS H OR CH3.
Inventors
- 👤 Stuart Raynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/22; C08F220/24; Y; Y10; Y10S; Y10S526/00; Y10S526/911; Y10T; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172; Y10T442/2189
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |