US2953591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonic acid phostones
Assignee: Monsanto Chemicals Ltd
•
Filing: 1958-05-07
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Granted: 1960-09-20
•
Expires: 1978-05-07
Abstract
No abstract record available.
Inventors
- 👤 Albert Y Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:05
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5357
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
AS NOVEL COMPOSITION OF MATTER, PHOSTONES CORRESPONDING TO THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
AS NOVEL COMPOSITION OF MATTER, PHOSTONES CORRESPONDING TO THE GENERAL FORMULA
Claim 3
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF PHOSTONES WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM 100-250* C. (1) AN ORGANIC PHOSPHITE SELECTED FROM THE GROUP CONSISTING OF THE MONO-, DI- AND TRI-SUBSTITUTED ESTERS OF PHOSPHOROUS ACID WHICH CORRESPOND TO THE GENERAL FORMULA:
Claim 4
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF PHOSTONES WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM 100-250* C. (1) AN ORGANIC PHOSPHITE SELECTED FROM THE GROUP CONSISTING OF THE MONO-, DI- AND TRI-SUBSTITUTED ESTERS OF PHOSPHOROUS ACID WHICH CORRESPOND TO THE GENERAL FORMULA:
References Cited (Backward Citations)
US2254124A
Cited
US2648695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |