Patent US2979523A successfully refreshed from Google Patents.
US2979523A
Expired / Lapsed
US
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Addition products of dialkyl acid orthophosphate and olefin oxides
Assignee: Gulf Oil Corp
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Filing: 1956-03-06
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Granted: 1961-04-11
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Troy L Cantrell
- 👤 John G Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2633; C10L1/2641; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; C10L1/143; C10L1/2666; C10L1/2683; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A SUBSTANTIALLY NEUTRAL ADDITION PRODUCT OF (A) AND OLEFIN OXIDE THAT CONTAINS 2 TO 4 CARBON ATOMS, AND (B) A DIALKYL ACID ORTHOPHOSPHATE PREPARED BY ESTERIFYING PHOSPHORUS PENTOXIDE WITH A MONOHYDRIC ALCOHOL THAT CONTAINS 5 TO 8 CARBON ATOMS IN THE RESPECTIVE MOLE PROPORTION OF ABOUT 1:4.
Claim 2
Dependent Claim
47 words
A SUBSTANTIALLY NEUTRAL ADDITION PRODUCT OF (A) AND OLEFIN OXIDE THAT CONTAINS 2 TO 4 CARBON ATOMS, AND (B) A DIALKYL ACID ORTHOPHOSPHATE PREPARED BY ESTERIFYING PHOSPHORUS PENTOXIDE WITH A MONOHYDRIC ALCOHOL THAT CONTAINS 5 TO 8 CARBON ATOMS IN THE RESPECTIVE MOLE PROPORTION OF ABOUT 1:4.
References Cited (Backward Citations)
US2241244A
Cited
US2372244A
Cited
US2427173A
Cited
US2477220A
Cited
US2478377A
Cited
US2586897A
Cited
US2716657A
Cited
US2589326A
Cited
US2755296A
Cited
US2723971A
Cited
US2830069A
Cited
US2842462A
Cited
US2783204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |