US2739978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialkyl monoaryl esters of orthophosphoric acid
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-11-06
•
Granted: 1956-03-27
•
Expires: 1970-11-06
Abstract
No abstract record available.
Inventors
- 👤 Harry R Gamrath
- 👤 Roger E Hatton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:41
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
AS NEW CHEMICAL COMPOUNDS, THE DIALKYL MONOARYL ESTERS OF ORTHO-PHOSPHORIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim
14 words
AS NEW CHEMICAL COMPOUNDS, THE DIALKYL MONOARYL ESTERS OF ORTHO-PHOSPHORIC ACID HAVING THE FORMULA
Claim 3
Dependent Claim
15 words
A PROCESS FOR THE PREPARATION OF DIALKYL MONOARYL ESTERS OF ORTHO-PHOSPHORIC ACID HAVING THE FORMULA
Claim 4
Dependent Claim
15 words
A PROCESS FOR THE PREPARATION OF DIALKYL MONOARYL ESTERS OF ORTHO-PHOSPHORIC ACID HAVING THE 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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |