Patent US3014953A successfully refreshed from Google Patents.
US3014953A
Expired / Lapsed
US
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Method of preparing phosphorus esters
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-05-08
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Granted: 1961-12-26
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Expires: 1979-05-08
Abstract
No abstract record available.
Inventors
- 👤 Gail H Birum
- 👤 James L Dever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE METHOD WHICH COMPRISES HEATING BENZIL, AT A TEMPERATURE OF OVER 100*C. AND LESS THAN 200*C., WITH AN ESTER OF THE FORMULA
Claim 2
Independent Claim
22 words
THE METHOD WHICH COMPRISES HEATING BENZIL, AT A TEMPERATURE OF OVER 100*C. AND LESS THAN 200*C., WITH AN ESTER OF THE FORMULA
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) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |