US2661359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing adducts
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-02-15
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Granted: 1953-12-01
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Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Dazzi Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:10
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS OF PREPARING ADDUCTS WHICH COMPRISES HEATING, AT TEMPERATURES OF FROM 150* C. TO 3000* C., A MIXTURE COMPRISING MALEIC ANHYDRIDE, OLEIC ACID AND AN ARYL ESTER OF AN ACID SELECTED FROM THE CLASS CONSISTING OF PHOSPHOROUS ACID AND HYPOPHOSPHOROUS ACID, THE QUANTITY OF SAID ARYL ESTER BEING FROM 0.5 PER CENT TO 5.0 PER CENT BY WEIGHT OF THE WEIGHT OF THE MALEIC ANHYDRIDE.
Claim 2
Dependent Claim
66 words
THE PROCESS OF PREPARING ADDUCTS WHICH COMPRISES HEATING, AT TEMPERATURES OF FROM 150* C. TO 3000* C., A MIXTURE COMPRISING MALEIC ANHYDRIDE, OLEIC ACID AND AN ARYL ESTER OF AN ACID SELECTED FROM THE CLASS CONSISTING OF PHOSPHOROUS ACID AND HYPOPHOSPHOROUS ACID, THE QUANTITY OF SAID ARYL ESTER BEING FROM 0.5 PER CENT TO 5.0 PER CENT BY WEIGHT OF THE WEIGHT OF THE MALEIC ANHYDRIDE.
References Cited (Backward Citations)
US2306281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |