US3578619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing metal chelates of beta-ketoesters
Assignee: BC Research (Canada)
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Filing: 1969-02-28
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Granted: 1971-05-11
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Expires: 1989-02-28
Abstract
Abstract AN IMPROVED PROCESS FOR PREPARING METAL CHELATES OF BKETOESTERS DERIVED FROM HIGHER ALCOHOLS, GLYCOLS, POLYOLS OR POLYMERS CONTAINING HYDROXYL GROUPS WHICH COMPRISES REACTING A HIGHER ALCOHOL, GLYCOL, POLYOL OR POLYMER CONTAINING HYDROXYL GROUPS WITH A METAL CHELATE OF A B-KETOESTER DERIVED FROM A VOLATILE ALCOHOL, SO THAT A TRANSESTERIFICATION TAKES WITH ELIMINATION OF THE VOLATILE ALCOHOL.
Inventors
- 👤 James A Reeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/681; C07; C07F; C07F5/00; C07F5/06; C07F5/069; C08B; C08B11/00; C08B11/20; C08B15/00; C08B15/05; C08F; C08F8/00; C08F8/14; C08G63/91; C08G63/914; C08G79/00; C08K; C08K5/00; C08K5/04; C08K5/10
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |