Patent US2911434A successfully refreshed from Google Patents.
US2911434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active dicarboxylic acid esters of polyalkylene oxides
Assignee: Visco Products Co
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Filing: 1956-04-24
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Granted: 1959-11-03
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Expires: 1976-04-24
Abstract
No abstract record available.
Inventors
- 👤 Earl T Kocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:51
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN ORGANIC POLYCARBOXY ACID MONOMERIC ESTER OF AN ORGANIC POLYCARBOXY ACID AND AN ETHER ALCOHOL HAVING THREE TERMINAL PRIMARY HYDROXY GROUPS, SAID ESTER BEING CHARACTERIZED BY A CENTRAL ALIPHATIC GROUP CONTAINING 3 TO 6 CARBON ATOMS AND THREE POLYOXYALKYLENE CHAINS ATTACHED TO DIFFERENT CARBON ATOMS OF SAID CENTRAL GROUP, THE OXYALKYLENE GROUPS IN SAID POLOXYALKYLENE CHAINS BEING OXYALKYLENE AND OXY-1,2-PROPLENE GROUPS AND BEING DERIVED FROM AT LEAST 1/3 PART AND NOT MORE THAN 9 PARTS OF 1,2-PROPYLENE OXIDE FOR EACH PART OF ETHYLENE OXIDE BY WEIGHT, THE MOLECULAR WEIGHT OF SAID ESTER ATTRIBUTABLE TO SAID ETHER ALCOHOL BEING AT LEAST 1000.
Claim 2
Dependent Claim
101 words
AN ORGANIC POLYCARBOXY ACID MONOMERIC ESTER OF AN ORGANIC POLYCARBOXY ACID AND AN ETHER ALCOHOL HAVING THREE TERMINAL PRIMARY HYDROXY GROUPS, SAID ESTER BEING CHARACTERIZED BY A CENTRAL ALIPHATIC GROUP CONTAINING 3 TO 6 CARBON ATOMS AND THREE POLYOXYALKYLENE CHAINS ATTACHED TO DIFFERENT CARBON ATOMS OF SAID CENTRAL GROUP, THE OXYALKYLENE GROUPS IN SAID POLOXYALKYLENE CHAINS BEING OXYALKYLENE AND OXY-1,2-PROPLENE GROUPS AND BEING DERIVED FROM AT LEAST 1/3 PART AND NOT MORE THAN 9 PARTS OF 1,2-PROPYLENE OXIDE FOR EACH PART OF ETHYLENE OXIDE BY WEIGHT, THE MOLECULAR WEIGHT OF SAID ESTER ATTRIBUTABLE TO SAID ETHER ALCOHOL BEING AT LEAST 1000.
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) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |