US2880223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of dialkyl alkanephosphonates
Assignee: Individual
•
Filing: 1952-09-09
•
Granted: 1959-03-31
•
Expires: 1972-09-09
Abstract
No abstract record available.
Inventors
- 👤 Coates Harold
- 👤 Hunter William Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:12
CPC Classifications
C; C07; C07J; C07J63/00; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/142; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A PROCESS OF PREPARING A COMPLEX OF THE FORMULA (RO)3P.CUX WHERIN R IS A LOWER ALPHATIC HYDROCARBON GROUP AND X IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE, BROMINE AND IODINE WHICH COMPRISES FORMING A MIXTURE CONSISTING ESSENTIALLY OF AT LEAST ONE LOWER UNSUBSTITUDE ALKANOL, A CUPROUS HALIDE AND AN INERT SOLVENT, AND ADDING PHOSPHOROUS TRICHLORIDE TO SAID MIXTURE AT A TEMPERATURE OF THE ORDER OF -5*C. WHILE AGITATING SAID MIXTURE
Claim 2
Dependent Claim
71 words
A PROCESS OF PREPARING A COMPLEX OF THE FORMULA (RO)3P.CUX WHERIN R IS A LOWER ALPHATIC HYDROCARBON GROUP AND X IS SELECTED FROM THE CLASS CONSISTING OF CHLORINE, BROMINE AND IODINE WHICH COMPRISES FORMING A MIXTURE CONSISTING ESSENTIALLY OF AT LEAST ONE LOWER UNSUBSTITUDE ALKANOL, A CUPROUS HALIDE AND AN INERT SOLVENT, AND ADDING PHOSPHOROUS TRICHLORIDE TO SAID MIXTURE AT A TEMPERATURE OF THE ORDER OF -5*C. WHILE AGITATING SAID MIXTURE
Claim 3
Dependent Claim
67 words
A PROCESS OF PREPARING A LOWER UNSUBSTITUTED DIALKYL ALKANEPHOSPHONATE WHICH COMPRISES USPENDING IN A HIGH BOILING LIQUID A COMPLEX OF THE FORMULA (RO)3P.CUCL, WHEREIN R REPRESENTS AN UNSUBSTITUTED LOWER ALKYL GROUP, HEATING SAID SUSPENSION TO A TEMPERATURE OF SUBSTANTIALLY 200*C. AT A PRESSURE OF THE ORDER OF, BUT NOT BELOW, NORMAL ATMOSPHERIC PRESSURE, SAID LIQUID BEING ONE WHICH IS INERT AND STABLE AT SAID TEMPERATURE AND PRESSURE.
Claim 4
Dependent Claim
67 words
A PROCESS OF PREPARING A LOWER UNSUBSTITUTED DIALKYL ALKANEPHOSPHONATE WHICH COMPRISES USPENDING IN A HIGH BOILING LIQUID A COMPLEX OF THE FORMULA (RO)3P.CUCL, WHEREIN R REPRESENTS AN UNSUBSTITUTED LOWER ALKYL GROUP, HEATING SAID SUSPENSION TO A TEMPERATURE OF SUBSTANTIALLY 200*C. AT A PRESSURE OF THE ORDER OF, BUT NOT BELOW, NORMAL ATMOSPHERIC PRESSURE, SAID LIQUID BEING ONE WHICH IS INERT AND STABLE AT SAID TEMPERATURE AND PRESSURE.
Claim 5
Independent Claim
91 words
A METHOD OF PREPEARING A LOWER DIALKYL ALKANEPHOSPHONATE WHICH COMPRISES REACTING A LOWER UNSUBSTITUTED ALKANOL WITH CUPROUS CHLORIDE AND PHOSPHOROUS TRICHLORIDE TO FORM THE COMPLEX (RO)3P.CUCL, WHERE R IS A LOWER UNSUBSTITUTED ALKYL GROUP, AND THEN SUSPENDING SAID COMPLEX IN A HIGH BOILING LIQUID AND HEATING THE RESULTING SUSPENSION AT A TEMPERATURE OF SUBSTANTIALLY 200*C. AND A PRESSURE OF THE ORDER OF, BUT NOT BELOW, NORMAL ATMOSPHERIC PRESSURE TO THEREBY DECOMPOSED SAID COMPLEX AND PRODUCE SAID LOWER DIALKYL METHANEPHOSPHONATE, SAID LIQUID BEING ONE WHICH IS INERT AND STABLE AT AID TEMPER
Claim 6
Independent Claim
91 words
A METHOD OF PREPEARING A LOWER DIALKYL ALKANEPHOSPHONATE WHICH COMPRISES REACTING A LOWER UNSUBSTITUTED ALKANOL WITH CUPROUS CHLORIDE AND PHOSPHOROUS TRICHLORIDE TO FORM THE COMPLEX (RO)3P.CUCL, WHERE R IS A LOWER UNSUBSTITUTED ALKYL GROUP, AND THEN SUSPENDING SAID COMPLEX IN A HIGH BOILING LIQUID AND HEATING THE RESULTING SUSPENSION AT A TEMPERATURE OF SUBSTANTIALLY 200*C. AND A PRESSURE OF THE ORDER OF, BUT NOT BELOW, NORMAL ATMOSPHERIC PRESSURE TO THEREBY DECOMPOSED SAID COMPLEX AND PRODUCE SAID LOWER DIALKYL METHANEPHOSPHONATE, SAID LIQUID BEING ONE WHICH IS INERT AND STABLE AT AID TEMPER
References Cited (Backward Citations)
US2137792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |