US2587340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of alkanephosphonic acids
Assignee: California Research LLC
•
Filing: 1948-02-04
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Granted: 1952-02-26
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Expires: 1968-02-04
Abstract
No abstract record available.
Inventors
- 👤 Allen H Lewis
- 👤 Richard D Stayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
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
92 words
A POLYOXYALKYLENE ESTER OF ALKANEPHOSPHONIC ACID HAVING A SATURATED ALKYL GROUP OF FROM 10 TO 18 CARBON ATOMS ATTACHED TO THE PHOSPHORUS ATOM OF SAID ACID AND AT LEAST ONE POLYOXYALKYLENE GROUP CONSISTING OF A SERIES OF FROM 2 TO 5 OXYALKYLENE GROUPS CONTAINING EACH FROM 2 TO 4 CARBON ATOMS, SAID OXYALKYLENE GROUPS BEING CONSECUTIVELY JOINED TO EACH OTHER AND ATTACHED TO SAID PHOSPHORUS ATOM THROUGH AN OXYGEN ATOM AND TERMINATING BY A MEMBER OF THE GROUP CONSISTING OF A HYDROGEN AND ALKYL RADICALS OF FROM 1 TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
92 words
A POLYOXYALKYLENE ESTER OF ALKANEPHOSPHONIC ACID HAVING A SATURATED ALKYL GROUP OF FROM 10 TO 18 CARBON ATOMS ATTACHED TO THE PHOSPHORUS ATOM OF SAID ACID AND AT LEAST ONE POLYOXYALKYLENE GROUP CONSISTING OF A SERIES OF FROM 2 TO 5 OXYALKYLENE GROUPS CONTAINING EACH FROM 2 TO 4 CARBON ATOMS, SAID OXYALKYLENE GROUPS BEING CONSECUTIVELY JOINED TO EACH OTHER AND ATTACHED TO SAID PHOSPHORUS ATOM THROUGH AN OXYGEN ATOM AND TERMINATING BY A MEMBER OF THE GROUP CONSISTING OF A HYDROGEN AND ALKYL RADICALS OF FROM 1 TO 4 CARBON ATOMS.
References Cited (Backward Citations)
US2268157A
Cited
US2268158A
Cited
US2311306A
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US2365466A
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US2382622A
Cited
US2436141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |