US3790648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of benzylphosphonates
Assignee: Novartis Corp
•
Filing: 1972-02-11
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Granted: 1974-02-05
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Expires: 1992-02-11
Abstract
Abstract PROCESS FOR THE MANUFACTURE OF 4-HYDROXYBENZYLPHOSPHONIC ESTER BY REACTING ESTERS OF PHOSPHORIC ACID WITH 4-HYDROXYBENZYLAMINES IN THE PRESENCE OF A BASE. THE COMPOUNDS MANUFACTURED ACCORDING TO THE INVENTION ARE USED AS STABILIZERS.
Inventors
- 👤 A Schmidt
- 👤 H Brunetti
- 👤 K Schwarzenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4056; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |