US3400148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphonate compounds
Assignee: Procter and Gamble Co
•
Filing: 1965-09-23
•
Granted: 1968-09-03
•
Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Oscar T Quimby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:58
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/3053; A; A01; A01N; A01N25/00; A01N25/02; C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/386; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/361; C22; C22B; C22B26/00; C22B26/20; C22B3/00; C22B3/20; C22B3/26; C22B3/38; C22B3/386; C02F2103/00; C02F2103/42; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
4 words
COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOUNDS HAVING THE FORMULA:
Claim 3
Dependent Claim
14 words
A PROCESS OF PREPARING ETHANE-1-HYDROXY-1,1,2-TRIPHOSPHONIC ACID WHICH COMPRISES REACTING A COMPOUND HAVING A FORMULA:
Claim 4
Dependent Claim
14 words
A PROCESS OF PREPARING ETHANE-1-HYDROXY-1,1,2-TRIPHOSPHONIC ACID WHICH COMPRISES REACTING A COMPOUND HAVING A FORMULA:
Claim 5
Dependent Claim
117 words
A PROCESS FOR PREPARING ETHANE-2-HYDROXY-1,1,2-TRIPHOSPHONIC ACID WHICH COMPRISES THE STEPS OF REACTING TETRAALKYL ETHANE-2-ALKOXY-1,1-DIPHOSPHONATE, THE ALKYL RADICAL CONTAINING LESS THAN 7 CARBON ATOMS, WITH HYDROGEN DIALKYLPHOSPHITE, THE ALKYL RADICAL CONTAINING LESS THAN 7 CARBON ATOMS, IN THE PRESENCE OF A STRONG BASE CATALYST SELECTED FROM SODIUM, POTASSIUM, LITHIUM, AND HYDRIDES OF THESE METALS AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20*C. TO ABOUT 100*C. FOR A PERIOD OF FROM ABOUT 1 TO ABOUT 3 HOURS TO FORM A REACTION PRODUCT, HYDROLYZING SAID REACTION PRODUCT BY ADDING AN EXCESS OF AN AQUEOUS HYDROGEN HALIDE AND HEATING TO A TEMPERATURE OF FROM ABOUT 105*C. TO ABOUT 110*C. FOR A PERIOD OF FROM ABOUT 2 TO 8 HOURS.
Claim 6
Dependent Claim
117 words
A PROCESS FOR PREPARING ETHANE-2-HYDROXY-1,1,2-TRIPHOSPHONIC ACID WHICH COMPRISES THE STEPS OF REACTING TETRAALKYL ETHANE-2-ALKOXY-1,1-DIPHOSPHONATE, THE ALKYL RADICAL CONTAINING LESS THAN 7 CARBON ATOMS, WITH HYDROGEN DIALKYLPHOSPHITE, THE ALKYL RADICAL CONTAINING LESS THAN 7 CARBON ATOMS, IN THE PRESENCE OF A STRONG BASE CATALYST SELECTED FROM SODIUM, POTASSIUM, LITHIUM, AND HYDRIDES OF THESE METALS AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20*C. TO ABOUT 100*C. FOR A PERIOD OF FROM ABOUT 1 TO ABOUT 3 HOURS TO FORM A REACTION PRODUCT, HYDROLYZING SAID REACTION PRODUCT BY ADDING AN EXCESS OF AN AQUEOUS HYDROGEN HALIDE AND HEATING TO A TEMPERATURE OF FROM ABOUT 105*C. TO ABOUT 110*C. FOR A PERIOD OF FROM ABOUT 2 TO 8 HOURS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |