US2724718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phosphorus-containing organic compounds
Assignee: Shell Development Co
•
Filing: 1948-04-12
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Granted: 1955-11-22
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Expires: 1968-04-12
Abstract
No abstract record available.
Inventors
- 👤 Alan R Stiles
- 👤 Frederick F Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C07F9/38; C07F9/40; C07F9/46; C07F9/4808; C07F9/4816
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PREPARATION OF A COMPOUND CONTAINING THE GROUPING (C-C-P$O) WHICH COMPRISES CAUSING A PHOSPHORUS-CONTAINING COMPOUND CONTAINING THE GROUPING (H-P-$O) AS THE ONLY REACTING GROUPING TO REACT WITH AN UNSATURATED ORGANIC COMPOUND CONTAINING A PAIR OF CARBON ATOMS THAT ARE DIRECTLY INTERCONNECTED BY AN OLEFINIC BOND BY SUBJECTING A REACTION MIXTURE COMPRISING SAID REACTANTS TO THE ACTION OF A FREE RADICAL REACTION INITIATOR.
References Cited (Backward Citations)
US2254124A
Cited
US2313741A
Cited
US2440800A
Cited
US2402137A
Cited
US2439214A
Cited
US2478390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |