Patent US3242236A successfully refreshed from Google Patents.
US3242236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing tetraalkyl ethylenediphosphonates
Assignee: Monsanto Research Corp
•
Filing: 1963-01-30
•
Granted: 1966-03-22
•
Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Moedritzer Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:46
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4025; C07F9/4028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE METHOD WHICH COMPRISES CONTACTING, IN THE PRESENCE OF AN INERT, ORGANIC LIQUID DILUENT, A PHOSPHORUS COMPOUND OF THE FORMULA
Claim 2
Independent Claim
20 words
THE METHOD WHICH COMPRISES CONTACTING, IN THE PRESENCE OF AN INERT, ORGANIC LIQUID DILUENT, A PHOSPHORUS COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2599761A
Cited
US2634288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |