Patent US2866808A successfully refreshed from Google Patents.
US2866808A
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Chemical process for producing tri (beta-haloaliphatic) esters of phosphorus acids
Assignee: Ethyl Corp
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Filing: 1954-08-04
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Granted: 1958-12-30
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Kolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:39
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C07F9/16; C07F9/165; C07F9/1651
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
PROCESS OF PREPARING A TRI-(B-HALOALIPHATIC) ESTER OF A MONOMERIC ACID OF PHOSPHORUS WHICH COMPRISES REACTING AT A TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 100* C. AND IN THE PRESENCE OF A CATALYTIC QUANTITY OF A BASIC AMINE AS CATALYST, AN ALIPHATIC COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
45 words
PROCESS OF PREPARING A TRI-(B-HALOALIPHATIC) ESTER OF A MONOMERIC ACID OF PHOSPHORUS WHICH COMPRISES REACTING AT A TEMPERATURE BETWEEN ABOUT 0* AND ABOUT 100* C. AND IN THE PRESENCE OF A CATALYTIC QUANTITY OF A BASIC AMINE AS CATALYST, AN ALIPHATIC COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US1936985A
Cited
US2053752A
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US2157164A
Cited
US2169185A
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US2520393A
Cited
US2536647A
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US2647140A
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US2610978A
Cited
US2741637A
Cited
US2724719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |