Patent US3712929A successfully refreshed from Google Patents.
US3712929A
Expired / Lapsed
US
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1-perfluoroalkyl-1,2,2-triphenylethylenes
Assignee: EIDP Inc
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Filing: 1969-10-31
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Granted: 1973-01-23
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Expires: 1989-10-31
Abstract
Abstract CERTAIN 1 - PERFLUOROALKYL - 1,2,2-TRIPHENYLETHYLENES ARE EFFECTIVE IN PREVENTING PREGNANCY IN WARM-BLOODED ANIMALS AND CAN BE ADMINISTERED AFTER COITUS. THE PREFERRED 1 - PERFLUOROALKYL - 1,2,2 : TRIPHENYLETHYLENES HAVE AN OXYGEN ATOM ATTACHEED TO THE PARA POSITION OF AT LEAST ONE OF THE BENZENE RINGS, POSSIBLE SUBSTITUENTS INCLUDING THE HYDROXYL, AN ALKOXY GROUPS, AND AN ACYLOXY GROUP. THE BENZENE RING IN THE 1-POSITION OF 1-PERFLUOROALKYL-1,2,2-TRIPHENYLETHYLENE CAN HAVE ONE OR MORE HALOGEN OR LOWER PERFLUOROALKYL SUBSTITUENTS.
Inventors
- 👤 W Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088; C07C; C07C17/00; C07C17/093; C07C17/16; C07C17/23; C07C17/26; C07C17/263; C07C17/2632; C07C22/00; C07C22/02; C07C22/04; C07C22/08; C07C37/00; C07C37/11; C07C37/18; C07C39/00; C07C39/24; C07C39/373; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07C43/00; C07C43/02; C07C43/20; C07C43/225; C07C43/23
Claims Analysis
Total Claims: 0
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |