Patent US2538266A successfully refreshed from Google Patents.
US3740421A
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Polyoxyethylene-polyoxypropylene aqueous gels
Assignee: BASF Corp
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Filing: 1966-09-19
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Granted: 1973-06-19
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Expires: 1986-09-19
Abstract
Abstract CLEAR AQUEOUS GELS ARE PREPARED FROM CERTAIN POLYOXYETHYLENE POLYOXYPROPYLENE BLOCK POLYMERS. THE GELS ARE PARTICULARLY USEFUL IN THE FORMULATION OF TOPICAL-APPLICABLE COSMETIC AND PHARMACEUTICAL COMPOSITIONS.
Inventors
- 👤 I Schmolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:38
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K47/00; A61K47/06; A61K47/08; A61K47/10; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/49; A61K8/494; A61K8/4946; A61K8/72; A61K8/81; A61K8/8164; A61K8/90; A61K9/00; A61K9/0012; A61K9/0014; A61Q; A61Q15/00; A61Q17/00; A61Q17/005; A61Q19/00; A61Q5/00; A61Q5/02; B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0065; C; C08; C08L; C08L71/00; C08L71/02; C11; C11D; C11D1/00; C11D1/88; C11D1/94; C11D17/00; C11D17/0008; C11D17/003; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/3707; A61K2800/00; A61K2800/40; A61K2800/59; A61K2800/594; C11D1/66; C11D1/722
Claims Analysis
Total Claims: 0
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |