Patent US2418946A successfully refreshed from Google Patents.
Patent US2263680A successfully refreshed from Google Patents.
Patent US2701258A successfully refreshed from Google Patents.
US2701258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of colorless alkyl acid phosphates
Assignee: Oldbury Electro Chemical Co
•
Filing: 1952-12-08
•
Granted: 1955-02-01
•
Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 Brown James Howard
- 👤 Dearborn Robert John
- 👤 Power Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:01
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/11; C07F9/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE PREPARATION OF ALKYL ACID PHOSPHATES WHICH COMPRISES: MIXING, AT A TEMPERATURE BETWEEN ZERO AND 100 DEGREES CENTIGRADE, AND IN THE PRESENCE OF BETWEEN 0.1 AND TEN PERCENT, BASED ON THE AMOUNT OF ALCOHOL EMPLOYED, OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYPOPHOSPHOROUS ACID AND STABLE SALTS OF HYPOPHOSPHOROUS ACID, AN ALIPHATIC ALCOHOL AND PHOSPHORUS PENTOXIDE, AND SEPARATING A COLORLESS, NON-DARKENING ALKYL ACID PHOSPHATE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE PREPARATION OF ALKYL ACID PHOSPHATES WHICH COMPRISES: MIXING, AT A TEMPERATURE BETWEEN ZERO AND 100 DEGREES CENTIGRADE, AND IN THE PRESENCE OF BETWEEN 0.1 AND TEN PERCENT, BASED ON THE AMOUNT OF ALCOHOL EMPLOYED, OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYPOPHOSPHOROUS ACID AND STABLE SALTS OF HYPOPHOSPHOROUS ACID, AN ALIPHATIC ALCOHOL AND PHOSPHORUS PENTOXIDE, AND SEPARATING A COLORLESS, NON-DARKENING ALKYL ACID PHOSPHATE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2193965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |