US4024207A
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Diethyl hydroxymethylphosphonate esters, their preparation and use
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1975-06-25
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Granted: 1977-05-17
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Expires: 1995-06-25
Abstract
Abstract Novel diesters of diethyl hydroxymethylphosphonate of the formula: <IMAGE> <IMAGE> in which R1 and R4 are alkylene radicals -(CH2)m- in which m is 0 or an integer, R2 and R3 are H or alkyl radicals, the total number of carbon atoms in R1, R2, R3 and R4 being not more than 10, are described.
Inventors
- 👤 Jean-Marie J. Biehler
- 👤 Serge L. Lecolier
- 👤 Patrice M. Le Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
Diesters of diethyl hydroxymethylphosphonate of the formula: ##STR5## wherein R 1 and R 4 are alkylene radicals --(CH 2 ) m --, in which m is 0 or an integer, R 2 and R 3 are hydrogen or alkyl radicals, and the total number of carbon atoms in the radicals R 1 , R 2 , R 3 and R 4 is not more than 10.
Claim 2
Dependent Claim
66 words
Diesters of diethyl hydroxymethylphosphonate of the formula: ##STR5## wherein R 1 and R 4 are alkylene radicals --(CH 2 ) m --, in which m is 0 or an integer, R 2 and R 3 are hydrogen or alkyl radicals, and the total number of carbon atoms in the radicals R 1 , R 2 , R 3 and R 4 is not more than 10.
Claim 3
Dependent Claim
19 words
The compound according to claim 1, wherein m is 0 and R 2 and R 3 are both hydrogen.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |