Patent US2913498A successfully refreshed from Google Patents.
US2913498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic phosphorus compounds
Assignee: Primerica Inc
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Filing: 1956-09-18
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Granted: 1959-11-17
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Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:58
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/505; C07F9/5063; C07F9/5068
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A PROCESS FRO PRODUCING A PHOSPHORUS COMPOUND WHEREIN THE PHOSPHORUS ATOM IS BONDED DIRECTLY TO AT LEAST ONE ARYL GROUP WHICH COMPRISES REACTING AN ARYL MAGNESIUM CHLORIDE WITH A PHOSPHORUS HALIDE IN THE PRSENCE OF AT LEAST ONE MOLE OF A CYCLIC ETHER FOR EVERY MOLE OF ARYL MAGNESIUM CHLORIDE WHREIN SAID ETHER CONTAINS FROM 5 TO 6 ATOMS IN THE RING AND WHEREIN (A) THERE IS ONLY ONE OXYGEN ATOM IN THE RING, (B) THE OTHER RING ATOMS ARE CARBON, (C) ONE RING CARBON SEPARATED FROM THE OXYGEN ATOM IN THE RING BY TWO CARBON ATOMS MAY BE REPLACED BY AN ALKYL SUBSTITUTED NITROGEN ATOM, (D) THE RING CONTAINS NOT MORE THAN ONE DOUBLE BOND, (E) AT LEAST ONE CARBON ATOM ADJACENT THE OXYGEN ATOM IN SAID RING BEING FREE OF ANY SUBSTITUENTS OTHER THAN HYDROGEN, (F) SAID ETHER CONTAINS NO SUBSTITUENT WHICH REACTS WITH ORGANOMAGNESIUM CHLORIDES.
Claim 2
Dependent Claim
148 words
A PROCESS FRO PRODUCING A PHOSPHORUS COMPOUND WHEREIN THE PHOSPHORUS ATOM IS BONDED DIRECTLY TO AT LEAST ONE ARYL GROUP WHICH COMPRISES REACTING AN ARYL MAGNESIUM CHLORIDE WITH A PHOSPHORUS HALIDE IN THE PRSENCE OF AT LEAST ONE MOLE OF A CYCLIC ETHER FOR EVERY MOLE OF ARYL MAGNESIUM CHLORIDE WHREIN SAID ETHER CONTAINS FROM 5 TO 6 ATOMS IN THE RING AND WHEREIN (A) THERE IS ONLY ONE OXYGEN ATOM IN THE RING, (B) THE OTHER RING ATOMS ARE CARBON, (C) ONE RING CARBON SEPARATED FROM THE OXYGEN ATOM IN THE RING BY TWO CARBON ATOMS MAY BE REPLACED BY AN ALKYL SUBSTITUTED NITROGEN ATOM, (D) THE RING CONTAINS NOT MORE THAN ONE DOUBLE BOND, (E) AT LEAST ONE CARBON ATOM ADJACENT THE OXYGEN ATOM IN SAID RING BEING FREE OF ANY SUBSTITUENTS OTHER THAN HYDROGEN, (F) SAID ETHER CONTAINS NO SUBSTITUENT WHICH REACTS WITH ORGANOMAGNESIUM CHLORIDES.
References Cited (Backward Citations)
CA516306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |