US3110727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing methylphosphonic acid and derivatives
Assignee: Stauffer Chemical Co
•
Filing: 1960-10-26
•
Granted: 1963-11-12
•
Expires: 1980-10-26
Abstract
No abstract record available.
Inventors
- 👤 Toy Arthur Dock Fon
- 👤 Eugene H Uhing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:16
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A PROCESS FOR PRODUCING THE SODIUM SALTS OF METHYLPHOSPHONIC ACID WHICH COMPRISES YDROLYZING CHLOROMETHYLPHOSPHINIC ACID WITH AN AQUEOUS SOLUTION OF AT LEAST TWO MOLE EQUIVALENTS OF SODIUM HYDROXIDE AT A TEMPERATURE OF ABOUT 90*-120*C. WHILE MAINTAINING THE PH VALUE OF REACTION MIXTURE AT LEAST 11.0.
Claim 2
Dependent Claim
45 words
A PROCESS FOR PRODUCING THE SODIUM SALTS OF METHYLPHOSPHONIC ACID WHICH COMPRISES YDROLYZING CHLOROMETHYLPHOSPHINIC ACID WITH AN AQUEOUS SOLUTION OF AT LEAST TWO MOLE EQUIVALENTS OF SODIUM HYDROXIDE AT A TEMPERATURE OF ABOUT 90*-120*C. WHILE MAINTAINING THE PH VALUE OF REACTION MIXTURE AT LEAST 11.0.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |