US2989562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing bis (3-dialkylphosphonopropyl) esters
Assignee: Individual
•
Filing: 1960-04-18
•
Granted: 1961-06-20
•
Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Swern Daniel
- 👤 Hogan B Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:20
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/53; C08K5/5317; C08K5/5333; C10M2223/00; C10M2223/06; C10M2223/065; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A PROCESS FOR THE PREPARATION OF BIS(3-DIALKYLPHOSPHONOPROPYL) ESTERS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
12 words
A PROCESS FOR THE PREPARATION OF BIS(3-DIALKYLPHOSPHONOPROPYL) ESTERS OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2710301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |