US3337500A
Expired / Lapsed
US
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Copolyether esters and a process for their preparation
Assignee: Bayer AG
•
Filing: 1964-12-15
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Granted: 1967-08-22
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Expires: 1984-12-15
Abstract
No abstract record available.
Inventors
- 👤 Schnegg Robert
- 👤 Dippelhofer Robert
- 👤 Pelousek Herbert
- 👤 Nordt Herbert
- 👤 Dortmann Heinz-Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:35
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/664; C08G63/02; C08G63/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A LINEAR COPOLYETHER ESTER OF P-(B-HYDROXYETHOXY)BENZOIC ACID 1 TO 20 MOL PERCENT OF A DICARBOXOYLIC ACID SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
22 words
A LINEAR COPOLYETHER ESTER OF P-(B-HYDROXYETHOXY)BENZOIC ACID 1 TO 20 MOL PERCENT OF A DICARBOXOYLIC ACID SELECTED FROM THE GROUP CONSISTING OF
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |