US3810879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making aromatic hydrocarbon polymers and products produced thereby
Assignee: General Electric Co
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Filing: 1972-04-03
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Granted: 1974-05-14
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Expires: 1992-04-03
Abstract
Abstract AN ORGANOMETALLIC CONDENSATION POLYMERIZATION METHOD IS PROVIDED FOR MAKING CERTAIN AROMATIC HYDROCARBON POLYMERS INVOLVING THE LITHIATION OF PARTICULAR AROMATIC DIOLEFINS, SUCH AS COMPOUNDS HAVING TWO ISOLATED 1-ARYL-1,2-DIALKYLETHYLENE GROUPS IN A SINGLE MOLECULE, FOR EXAMPLE, 2,2-BIS(4-PHENYLCYCLOHEX-3-ENYL) PROPANE. THE RESULTING POLYMERS ARE FILM FORMING AND CAN BE EMPLOYED AS DIELECTRICS FOR MAKING CAPACITORS..
Inventors
- 👤 A Hay
- 👤 H Relles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:56
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C; C07; C07C; C07C13/00; C07C13/28; C08; C08F; C08F36/00; C08F36/02; C08F36/20; C08G; C08G61/00; C08G61/02; C08G61/10; C07C2601/00; C07C2601/12; C07C2601/14
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |