US2897172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of hydrolyzed polyacrylate esters and solutions thereof
Assignee: BASF Schweiz AG
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Filing: 1954-10-29
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Granted: 1959-07-28
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Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Maeder Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:47
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/046; A61K8/18; A61K8/72; A61K8/81; A61K8/8141; A61K8/8152; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A SOLUTION IN A WATER-SOLUBLE ALIPHATIC ALCOHOL OF LOW MOLECULAR WEIGHT OF A POLYMER OF ACRYLIC ACID ETHYL ESTER, WHICH CONTAINS CARBOXYL GROUPS NEUTRALIZED WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALAKLI AND TRIETHANOLAMINE, SAID POLYMER BEING SOLUBLE IN WATER AND ALSO SOLUBLE AT ORDINARY TEMPERATURE AND IN A CLOSED CONTAINER, AT LEAST IN COMBINATION WITH ANOTHER ORGANIC SOLVENT IN CHLORO FLUOROALKANES WHICH ARE GASEOUS AT ORDINARY TEMPERATURE AND PRESSURE, AND WHICH POLYMR IS PRODUCED BY POLYMERIZING ETHYL ACRYLATE IN SOLUTION IN A WATER-SOLUBLE ALIPHATIC ALCOHOL OF LOW MOLECULAR WEIGHT AN HYDROLYZING SUBSEQUENTLY IN THE RESULTING POLYMER SOLUTION A SUFFICIENT PROPORTION OF THE ESTER GROUPS TO RENDER THE ALKALI AND TRIETHANOLAMINE SALTS OF THE POLYMER SOLUBLE IN WATER.
References Cited (Backward Citations)
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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) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |