US3707529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric vinylidene fluoride polymers with 55-95 percent non-ionic end groups
Assignee: EIDP Inc
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Filing: 1970-09-04
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Granted: 1972-12-26
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Expires: 1990-09-04
Abstract
Abstract AN ELASTOMERIC VINYLIDENE FLUORIDE POLYMER CONSISTING ESSETNTIALLY OF 30-70% BY WEIGHT VINYLIDENE FLUORIDE UNITS AND 70-30% UNITS OF AT LEAST ONE OTHER FLUORINATED ETHYLENICALLY UNSATUREATE MONOMER, THE POLYMER HAVING A 5595 MOLAR PERCENT NON-IONIC END-GROUP CONCENTRATION AND AN INHERENT VISCOSITY OF 0.4 TO 1.1 AT 30*C. AT A CONCENTRATION OF 0.1% BY WEIGHT IN A MIXED SOLVENT OF 86.1% BY WEIGHT TETRAHYDROFURAN AND 13.9% BY WEIGHT DIMETHYLFORMAMIDE.
Inventors
- 👤 Edward K Gladding
- 👤 Jack L Nyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:23
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/18; C07D317/24; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/07; C07C309/12; C08; C08F; C08F214/00; C08F214/18; C08F214/22
Claims Analysis
Total Claims: 0
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |