US2997462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface active polyesters
Assignee: Henkel AG and Co KGaA
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Filing: 1957-02-12
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Granted: 1961-08-22
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Expires: 1977-02-12
Abstract
No abstract record available.
Inventors
- 👤 Wulff Carl
- 👤 Dohr Manfred
- 👤 Kranse Horst-Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:35
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C07; C07K; C07K1/00; C07K1/006; C11; C11D; C11D1/00; C11D1/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
ESTER SELECTED FROM THE GROUP CONSISTING OF THE ESTER OF POLYETHYLENE GLYCOL OF A MOLECULAR WEIGHT OF ABOUT 4,000 HAVING AT LEAST 5 ETHER OXYGEN ATOMS AND HEXAMETHYLENE DICARBONAMIDE BIS-VALERIC ACID AND THE ESTER OF POLYETHYLENE GLYCOL OF A MOLECULAR WEIGHT OF ABOUT 12,000 HAVING AT LEAST 5 ETHER OXYGEN ATOMS AND HEXAMETHYLENE DICARBONAMIDE BIS-LAURIC ACID.
Claim 2
Dependent Claim
56 words
ESTER SELECTED FROM THE GROUP CONSISTING OF THE ESTER OF POLYETHYLENE GLYCOL OF A MOLECULAR WEIGHT OF ABOUT 4,000 HAVING AT LEAST 5 ETHER OXYGEN ATOMS AND HEXAMETHYLENE DICARBONAMIDE BIS-VALERIC ACID AND THE ESTER OF POLYETHYLENE GLYCOL OF A MOLECULAR WEIGHT OF ABOUT 12,000 HAVING AT LEAST 5 ETHER OXYGEN ATOMS AND HEXAMETHYLENE DICARBONAMIDE BIS-LAURIC ACID.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |