US2670367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of esters of alkanephosphonic acids
Assignee: California Research LLC
•
Filing: 1950-09-05
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Granted: 1954-02-23
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Expires: 1970-09-05
Abstract
No abstract record available.
Inventors
- 👤 Allen H Lewis
- 👤 Richard D Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:56
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4075; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PREPARING HYDROXY ESTERS OF LONG-CHAIN ALKANE PHOSPHONIC ACIDS, WHICH COMPRISES HEATING TO A TEMPERATURE IN THE RANGE FROM ABOUT 20 TO ABOUT 200* C. ONE MOL OF A LONG-CHAIN ALKANE PHOSPHONIC ACID CONTAINING FROM 10 TO 18 CARBON ATOMS IN THE ALKANE PORTION THEREOF WITH AN EVEN NUMBER UP TO 20 MOLS OF AN OLEFIN OXIDE CONTAINING FROM 2 TO 4 CARBON ATOMS.
Claim 2
Independent Claim
66 words
THE METHOD OF PREPARING HYDROXY ESTERS OF LONG-CHAIN ALKANE PHOSPHONIC ACIDS, WHICH COMPRISES HEATING TO A TEMPERATURE IN THE RANGE FROM ABOUT 20 TO ABOUT 200* C. ONE MOL OF A LONG-CHAIN ALKANE PHOSPHONIC ACID CONTAINING FROM 10 TO 18 CARBON ATOMS IN THE ALKANE PORTION THEREOF WITH AN EVEN NUMBER UP TO 20 MOLS OF AN OLEFIN OXIDE CONTAINING FROM 2 TO 4 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |