Patent US3526651A successfully refreshed from Google Patents.
US3526651A
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US
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Polyalkyleneoxide - polysiloxane block copolymers and process for preparing same
Assignee: Evonik Operations GmbH
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Filing: 1967-02-27
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Granted: 1970-09-01
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Gerd Rossmy
- 👤 Gotz Koerner
- 👤 Jakob Wassermeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2483/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2834748A
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US2917480A
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US3194773A
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US3109012A
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US3183254A
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US3115512A
Cited
US3170894A
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US3356758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |