US2857415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphorus compounds
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-02-15
•
Granted: 1958-10-21
•
Expires: 1976-02-15
Abstract
No abstract record available.
Inventors
- 👤 Gail H Birum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
8 words
AN ESTER OF PHOSPHOROTHIOMETHYLIDYNETRIPHOSPHONIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim
8 words
AN ESTER OF PHOSPHOROTHIOMETHYLIDYNETRIPHOSPHONIC ACID HAVING THE FORMULA
Claim 3
Independent Claim
62 words
THE METHOD WHICH COMPRISES CONTACTING ONE MOLE OF PERCHLOROMETHYL MERCAPTAN WITH THREE MOLES OF A PHOSPHITE HAVING THE FORMULA (RO)2POR'' IN WHICH R IS A HALOALKYL RADICAL OF FROM 1 TO 6 CARBON ATOMS AND R'' IS SELECTED FROM THE CLASS CONSISTING OF R AND ALKALI METAL AND RECOVERING FROM THE RESULTING REACTION PRODUCT AN ESTER OF PHOSPHOROTHIOMETHYLIDYNETRIPHOSPHONIC ACID HAVING THE FORMULA
Claim 4
Independent Claim
62 words
THE METHOD WHICH COMPRISES CONTACTING ONE MOLE OF PERCHLOROMETHYL MERCAPTAN WITH THREE MOLES OF A PHOSPHITE HAVING THE FORMULA (RO)2POR'' IN WHICH R IS A HALOALKYL RADICAL OF FROM 1 TO 6 CARBON ATOMS AND R'' IS SELECTED FROM THE CLASS CONSISTING OF R AND ALKALI METAL AND RECOVERING FROM THE RESULTING REACTION PRODUCT AN ESTER OF PHOSPHOROTHIOMETHYLIDYNETRIPHOSPHONIC ACID HAVING THE FORMULA
References Cited (Backward Citations)
US2335953A
Cited
US2760937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |