Patent US3089892A successfully refreshed from Google Patents.
US3089892A
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Mono, di and cyclicphosphonate alkyl esters and process thereof
Assignee: Monsanto Chemicals Ltd
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Filing: 1960-10-31
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Granted: 1963-05-14
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Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Harwood Harold James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:36
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A PROCESS WHICH COMPRISES REACTING A TRIALKYL PHOSPHITE, HAVING FROM 1 TO 12 CARBON ATOMS IN EACH ALKYL RADICAL WITH A CONCENTRATED FORMALDEHYDE SOURCE HAVING AT LEAST 95% BY WEIGHT OF AVAILABLE FORMALDEHYDE, SAID SOURCES OF FORMALDEHYDE BEING SELECTED FROM THE GROUP CONSISTING OF POLYOXYMETHYLENE GLYCOLS HAVING A FORMULA
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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |